Frontier Funds 10-Q14 Aug 192019 Q2 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2019	Aug. 05, 2019
Document And Entity Information
Entity Registrant Name	Frontier Funds
Entity Central Index Key	0001261379
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity File Number	000-51274
Entity Filer Category	Non-accelerated Filer
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		0
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019

Statements of Financial Conditi

Statements of Financial Condition (Unaudited) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 316,615	$ 1,729,879
U.S. Treasury securities, at fair value	1,619,710	5,684,327
Receivable from futures commission merchants	2,969,199	11,255,848
Incentive fees receivable		78,845
Open trade equity, at fair value	42,147
Swap contracts, at fair value	20,044,944	20,149,868
Investments in private investment companies, at fair value	45,725,137	46,557,428
Interest receivable	32,415	117,168
Other assets	6,153
Total Assets	70,756,320	85,573,363
LIABILITIES
Open trade deficit, at fair value		398,189
Owner redemptions payable	449,276	23,759
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner	8,828	78,045
Interest payable to Managing Owner	1,630	10,852
Trading fees payable to Managing Owner	75,274	222,241
Service fees payable to Managing Owner	173,515	96,152
Risk analysis fees payable	9,994	27,562
Advance on unrealized Swap Appreciation	12,191,555	12,191,555
Subscriptions in advance for service fee rebates	564,008	497,326
Other liabilities	20,662	4,003
Total Liabilities	13,494,742	13,560,581
CAPITAL
Managing Owner Units	595,404	851,595
Limited Owner Units	56,666,174	71,161,187
Total Owners' Capital	57,261,578	72,012,782
Total Liabilities and Capital	70,756,320	85,573,363
The Series of the Frontier Funds [Member] \| Frontier Global Fund [Member]
ASSETS
Cash and cash equivalents	38,052	951,485
U.S. Treasury securities, at fair value	194,665	3,126,551
Incentive fees receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	5,964,788
Investments in unconsolidated trading companies, at fair value	18,384	4,292,075
Interest receivable	3,896	64,446
Total Assets	6,219,785	8,434,557
LIABILITIES
Owner redemptions payable	12,892
Management fees payable to Managing Owner		42,705
Interest payable to Managing Owner	660	8,124
Trading fees payable to Managing Owner	23,122	24,353
Service fees payable to Managing Owner	12,926	17,803
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	145,067	133,281
Subscriptions payable to private investment companies
Other liabilities	8,661
Total Liabilities	203,328	226,266
CAPITAL
Total Owners' Capital	6,016,457	8,208,291
Non-Controlling Interests
Total Capital	6,016,457	8,208,291
Total Liabilities and Capital	6,219,785	8,434,557
The Series of the Frontier Funds [Member] \| Frontier Global Fund [Member] \| Class 1 [Member]
CAPITAL
Limited Owner Units	$ 5,583,992	$ 7,755,444
Units Outstanding	38,876	58,946
Net Asset Value per Unit	$ 143.64	$ 131.57
The Series of the Frontier Funds [Member] \| Frontier Global Fund [Member] \| Class 2 [Member]
CAPITAL
Managing Owner Units	$ 62,770	$ 107,598
Limited Owner Units	$ 334,144	$ 313,167
Units Outstanding	1,913	2,248
Net Asset Value per Unit	$ 207.48	$ 187.17
The Series of the Frontier Funds [Member] \| Frontier Global Fund [Member] \| Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 35,551	$ 32,082
Units Outstanding	214	214
Net Asset Value per Unit	$ 166.13	$ 149.92
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member]
ASSETS
Cash and cash equivalents	$ 50,178	$ 135,096
U.S. Treasury securities, at fair value	256,696	443,921
Incentive fees receivable		697
Swap contracts, at fair value	3,036,673	2,955,444
Investments in private investment companies, at fair value	2,623,105	2,167,879
Investments in unconsolidated trading companies, at fair value	24,242	726,686
Interest receivable	5,137	9,150
Total Assets	5,996,031	6,438,873
LIABILITIES
Owner redemptions payable	4,696
Management fees payable to Managing Owner		9,201
Interest payable to Managing Owner	635	1,238
Trading fees payable to Managing Owner	10,467	10,189
Service fees payable to Managing Owner	6,240	6,684
Advance on unrealized Swap Appreciation	1,900,000	1,900,000
Subscriptions in advance for service fee rebates	53,155	46,159
Subscriptions payable to private investment companies
Other liabilities	1,495
Total Liabilities	1,976,688	1,973,471
CAPITAL
Total Owners' Capital	3,468,242	3,953,684
Non-Controlling Interests	551,101	511,718
Total Capital	4,019,343	4,465,402
Total Liabilities and Capital	5,996,031	6,438,873
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Class 1 [Member]
CAPITAL
Limited Owner Units	$ 2,839,339	$ 3,331,725
Units Outstanding	25,906	33,374
Net Asset Value per Unit	$ 109.6	$ 99.83
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Class 2 [Member]
CAPITAL
Managing Owner Units	$ 35,201	$ 46,961
Limited Owner Units	$ 584,479	$ 573,992
Units Outstanding	3,646	4,071
Net Asset Value per Unit	$ 169.96	$ 152.53
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 9,223	$ 1,006
Units Outstanding	73	9
Net Asset Value per Unit	$ 126.34	$ 111.78
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member]
ASSETS
Cash and cash equivalents	$ 12,895	$ 37,556
U.S. Treasury securities, at fair value	65,967	123,409
Receivable from futures commission merchants	2,969,199	2,683,299
Open trade equity, at fair value	42,147	220,659
Swap contracts, at fair value	10,691,012	10,794,908
Investments in private investment companies, at fair value	18,409,450	22,854,326
Investments in unconsolidated trading companies, at fair value	6,230	1,744,999
Interest receivable	1,320	2,544
Redemptions receivable from private investment companies
Other assets
Total Assets	32,198,220	38,461,700
LIABILITIES
Owner redemptions payable	428,273	23,759
Management fees payable to Managing Owner	8,828	13,917
Interest payable to Managing Owner		1,490
Trading fees payable to Managing Owner	76,075	101,770
Service fees payable to Managing Owner	45,227	56,791
Risk analysis fees payable	9,994	9,127
Advance on unrealized Swap Appreciation	6,176,555	6,176,555
Subscriptions in advance for service fee rebates	296,547	258,194
Other liabilities	192
Total Liabilities	7,041,691	6,641,603
CAPITAL
Total Owners' Capital	25,156,529	31,820,097
Non-Controlling Interests
Total Capital	25,156,529	31,820,097
Total Liabilities and Capital	32,198,220	38,461,700
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Class 1 [Member]
CAPITAL
Limited Owner Units	$ 19,585,430	$ 25,703,922
Units Outstanding	168,324	218,514
Net Asset Value per Unit	$ 116.36	$ 117.63
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Class 2 [Member]
CAPITAL
Managing Owner Units	$ 81,326	$ 125,021
Limited Owner Units	$ 4,026,999	$ 4,403,354
Units Outstanding	22,615	25,027
Net Asset Value per Unit	$ 181.66	$ 180.94
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Class 2a [Member]
CAPITAL
Managing Owner Units	$ 182,049	$ 251,097
Limited Owner Units	$ 43,789	$ 88,076
Units Outstanding	1,434	2,163
Net Asset Value per Unit	$ 157.49	$ 156.81
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Class 3a [Member]
CAPITAL
Limited Owner Units	$ 880,403	$ 893,515
Units Outstanding	5,611	5,718
Net Asset Value per Unit	$ 156.91	$ 156.26
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 356,533	$ 355,112
Units Outstanding	2,647	2,647
Net Asset Value per Unit	$ 134.69	$ 134.16
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member]
ASSETS
Cash and cash equivalents	$ 76,187	$ 25,072
U.S. Treasury securities, at fair value	389,753	82,386
Receivable from futures commission merchants
Open trade equity, at fair value
Swap contracts, at fair value
Investments in private investment companies, at fair value	2,665,985	3,252,075
Investments in unconsolidated trading companies, at fair value	587,909	523,180
Interest receivable	7,800	1,698
Redemptions receivable from private investment companies
Other assets
Total Assets	3,727,634	3,884,411
LIABILITIES
Owner redemptions payable	3,415
Management fees payable to Managing Owner
Interest payable to Managing Owner	335
Trading fees payable to Managing Owner	7,120	7,812
Service fees payable to Managing Owner	8,212	8,575
Risk analysis fees payable
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	14,233	11,162
Other liabilities	8,624
Total Liabilities	41,939	27,549
CAPITAL
Total Owners' Capital	3,685,695	3,856,862
Non-Controlling Interests
Total Capital	3,685,695	3,856,862
Total Liabilities and Capital	3,727,634	3,884,411
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Class 1 [Member]
CAPITAL
Limited Owner Units	$ 3,566,250	$ 3,709,130
Units Outstanding	46,901	51,939
Net Asset Value per Unit	$ 76.03	$ 71.41
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Class 2 [Member]
CAPITAL
Managing Owner Units	$ 38,714	$ 46,368
Limited Owner Units	$ 68,540	$ 99,467
Units Outstanding	917	1,348
Net Asset Value per Unit	$ 116.96	$ 108.18
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Class 3a [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 12,191	$ 1,897
Units Outstanding	138	23
Net Asset Value per Unit	$ 88.34	$ 82.48
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member]
ASSETS
Cash and cash equivalents	$ 37,348	$ 472,695
U.S. Treasury securities, at fair value	191,059	1,553,261
Incentive fees receivable		17,277
Swap contracts, at fair value	5,881,358	5,920,414
Investments in private investment companies, at fair value	11,200,504	11,084,463
Investments in unconsolidated trading companies, at fair value	18,043	1,160,910
Interest receivable	3,824	32,017
Due from Managing Owner
Redemptions receivable from private investment companies
Other assets	6,153
Total Assets	17,338,289	20,241,037
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner		3,875
Interest payable to Managing Owner
Trading fees payable to Managing Owner	36,982	44,827
Service fees payable to Managing Owner	2,464	4,498
Advance on unrealized Swap Appreciation	4,000,000	4,000,000
Subscriptions in advance for service fee rebates	23,105	20,430
Other liabilities
Total Liabilities	4,062,551	4,084,527
CAPITAL
Total Owners' Capital	13,275,738	16,156,510
Non-Controlling Interests
Total Capital	13,275,738	16,156,510
Total Liabilities and Capital	17,338,289	20,241,037
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 1 [Member]
CAPITAL
Limited Owner Units	$ 1,492,841	$ 1,703,556
Units Outstanding	14,573	16,661
Net Asset Value per Unit	$ 102.44	$ 102.25
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 1a [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 2 [Member]
CAPITAL
Managing Owner Units	$ 3,036	$ 3,005
Limited Owner Units	$ 5,882,255	$ 7,669,749
Units Outstanding	48,195	63,494
Net Asset Value per Unit	$ 122.11	$ 120.84
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 3 [Member]
CAPITAL
Managing Owner Units	$ 134,696	$ 172,426
Limited Owner Units	$ 5,762,910	$ 6,607,774
Units Outstanding	51,751	60,202
Net Asset Value per Unit	$ 113.96	$ 112.62
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 3a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member]
ASSETS
Cash and cash equivalents	$ 75,541	$ 46,374
U.S. Treasury securities, at fair value	386,444	152,384
Incentive fees receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	3,083,462	4,661,327
Investments in unconsolidated trading companies, at fair value	36,495	775,088
Interest receivable	7,734	3,141
Due from Managing Owner
Redemptions receivable from private investment companies
Other assets
Total Assets	3,589,676	5,638,314
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner		8,347
Interest payable to Managing Owner
Trading fees payable to Managing Owner	14,956	27,984
Service fees payable to Managing Owner	201	1,750
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	31,765	28,100
Other liabilities	1,305
Total Liabilities	48,227	66,181
CAPITAL
Total Owners' Capital	3,541,447	5,572,133
Non-Controlling Interests
Total Capital	3,541,447	5,572,133
Total Liabilities and Capital	3,589,674	5,638,314
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Class 1 [Member]
CAPITAL
Limited Owner Units	$ 123,131	$ 1,484,478
Units Outstanding	1,410	16,296
Net Asset Value per Unit	$ 87.33	$ 91.10
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Class 1a [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Class 2 [Member]
CAPITAL
Managing Owner Units	$ 16,450	$ 51,365
Limited Owner Units	$ 1,114,481	$ 1,241,610
Units Outstanding	10,863	12,008
Net Asset Value per Unit	$ 104.1	$ 107.68
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Class 3 [Member]
CAPITAL
Managing Owner Units	$ 19,377	$ 20,019
Limited Owner Units	$ 2,268,008	$ 2,774,661
Units Outstanding	23,449	27,734
Net Asset Value per Unit	$ 97.53	$ 100.77
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Class 3a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member]
ASSETS
Cash and cash equivalents	$ 26,414	$ 61,600
U.S. Treasury securities, at fair value	135,126	202,415
Incentive fees receivable		60,871
Swap contracts, at fair value	435,901	479,102
Investments in private investment companies, at fair value	1,624,880	1,729,241
Investments in unconsolidated trading companies, at fair value	12,761	28,163
Interest receivable	2,704	4,172
Due from Managing Owner
Redemptions receivable from private investment companies
Other assets
Total Assets	2,237,786	2,565,564
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner
Interest payable to Managing Owner
Trading fees payable to Managing Owner	4,793	5,306
Service fees payable to Managing Owner	4	51
Advance on unrealized Swap Appreciation	115,000	115,000
Subscriptions in advance for service fee rebates	136
Other liabilities	385
Total Liabilities	120,318	120,357
CAPITAL
Total Owners' Capital	2,117,468	2,445,207
Non-Controlling Interests
Total Capital	2,117,468	2,445,207
Total Liabilities and Capital	2,237,786	2,565,564
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 1 [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 1a [Member]
CAPITAL
Limited Owner Units	$ 16,174	$ 20,051
Units Outstanding	306	353
Net Asset Value per Unit	$ 52.86	$ 56.80
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 2 [Member]
CAPITAL
Managing Owner Units	$ 5,466	$ 5,998
Limited Owner Units	$ 57,193	$ 78,098
Units Outstanding	636	851
Net Asset Value per Unit	$ 98.52	$ 98.82
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 2a [Member]
CAPITAL
Managing Owner Units	$ 15,143	$ 20,484
Limited Owner Units	$ 95,703	$ 165,985
Units Outstanding	1,781	2,803
Net Asset Value per Unit	$ 62.24	$ 66.52
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 3 [Member]
CAPITAL
Managing Owner Units
Limited Owner Units	$ 1,646,165	$ 1,791,417
Units Outstanding	15,929	17,282
Net Asset Value per Unit	$ 103.34	$ 103.66
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 3a [Member]
CAPITAL
Managing Owner Units	$ 1,174	$ 1,253
Limited Owner Units	$ 280,450	$ 361,921
Units Outstanding	4,303	5,201
Net Asset Value per Unit	$ 65.45	$ 69.83

Condensed Schedule of Investmen

Condensed Schedule of Investments (Unaudited) - USD ($)		Jun. 30, 2019		Dec. 31, 2018
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Investment Owned, % of Total Capital (Net Asset Value)		0.14%		7.19%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Swap [Member]
Investment Owned, Fair Value		$ 5,881,358	[1]	$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)		44.30%	[1]	36.64%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Swap [Member] \| Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value		$ 5,881,358	[1]	$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)		44.30%	[1]	36.64%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Swap [Member] \| Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value		$ 12,049,867	[2]	$ 11,084,463
Investment Owned, % of Total Capital (Net Asset Value)		90.75%	[2]	68.60%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		$ 850,072	[2]	$ 855,522
Investment Owned, % of Total Capital (Net Asset Value)		6.40%	[2]	5.30%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		$ 1,228,724	[2]	$ 1,150,943
Investment Owned, % of Total Capital (Net Asset Value)		9.26%	[2]	7.12%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		$ 2,245,712	[2]	$ 1,789,814
Investment Owned, % of Total Capital (Net Asset Value)		16.92%	[2]	11.08%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value		$ 1,408,553	[2]	$ 1,517,376
Investment Owned, % of Total Capital (Net Asset Value)		10.61%	[2]	9.39%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value		$ 171,906	[2]	$ 1,650,526
Investment Owned, % of Total Capital (Net Asset Value)		1.29%	[2]	10.22%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		$ 475,189	[2]	$ 446,649
Investment Owned, % of Total Capital (Net Asset Value)		3.58%	[2]	2.76%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		$ 1,768,677	[2]	$ 300,708
Investment Owned, % of Total Capital (Net Asset Value)		13.32%	[2]	1.86%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 2,862,338	[2]	$ 3,266,499
Investment Owned, % of Total Capital (Net Asset Value)		21.56%	[2]	20.22%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]	0.00%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		$ 189,333	[2]	$ 106,426
Investment Owned, % of Total Capital (Net Asset Value)		1.43%	[2]	0.66%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 18,043	[2]	$ 1,160,910
Investment Owned, % of Total Capital (Net Asset Value)		0.14%	[2]	7.19%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 18,043	[2]	$ 216,107
Investment Owned, % of Total Capital (Net Asset Value)		0.14%	[2]	1.34%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value			[2]	$ 944,803
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]	5.85%
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 191,059	[3]	$ 1,553,261
Investment Owned, % of Total Capital (Net Asset Value)		1.44%	[3]	9.61%
Investment Owned, Underlying Face Amount, at Face Value				$ 1,232,919
Investment Owned, at Cost				1,527,337
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 191,059	[3]	$ 1,553,261
Investment Owned, % of Total Capital (Net Asset Value)		1.44%	[3]	9.61%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,255,000	[3]	$ 1,232,919
Investment Owned, at Cost		1,606,935	[3]	$ 1,527,337
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value	[3]	148,039
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value	[3]	189,552
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		148,039
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 189,552
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Investment Owned, % of Total Capital (Net Asset Value)		1.03%		13.91%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Swap [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Swap [Member] \| Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Swap [Member] \| Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value		$ 3,083,463	[2]	$ 4,661,327
Investment Owned, % of Total Capital (Net Asset Value)		87.07%	[2]	83.65%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		$ 423,288	[2]	$ 695,585
Investment Owned, % of Total Capital (Net Asset Value)		11.95%	[2]	12.48%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		$ 1,060,324	[2]
Investment Owned, % of Total Capital (Net Asset Value)		29.94%	[2]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 1,037,971	[2]	$ 2,667,361
Investment Owned, % of Total Capital (Net Asset Value)		29.31%	[2]	47.87%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		$ 561,880	[2]	$ 1,298,381
Investment Owned, % of Total Capital (Net Asset Value)		15.87%	[2]	23.30%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 36,495	[2]	$ 775,088
Investment Owned, % of Total Capital (Net Asset Value)		1.03%	[2]	13.91%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 36,495	[2]	$ 21,201
Investment Owned, % of Total Capital (Net Asset Value)		1.03%	[2]	0.38%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value			[2]	$ 753,887
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]	13.53%
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 386,444	[3]	$ 152,384
Investment Owned, % of Total Capital (Net Asset Value)		10.91%	[3]	2.73%
Investment Owned, Underlying Face Amount, at Face Value				$ 120,957
Investment Owned, at Cost				149,841
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 386,444	[3]	$ 152,384
Investment Owned, % of Total Capital (Net Asset Value)		10.91%	[3]	2.73%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,255,000	[3]	$ 120,957
Investment Owned, at Cost		1,606,935	[3]	$ 149,841
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value	[3]	299,428
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value	[3]	383,396
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		299,428
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 383,396
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Frontier Trading Company XXXVIII [Member]
Investment Owned, % of Total Capital (Net Asset Value)		0.60%		1.15%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Swap [Member]
Investment Owned, Fair Value		$ 435,901	[1]	$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)		20.59%	[1]	19.59%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Swap [Member] \| Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Swap [Member] \| Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value		$ 435,901	[1]	$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)		20.59%	[1]	19.59%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value		$ 1,624,880	[2]	$ 1,729,241
Investment Owned, % of Total Capital (Net Asset Value)		76.74%	[2]	70.72%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		$ 272,797	[2]	$ 230,848
Investment Owned, % of Total Capital (Net Asset Value)		12.88%	[2]	9.44%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 591,529	[2]	$ 887,952
Investment Owned, % of Total Capital (Net Asset Value)		27.94%	[2]	36.31%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		$ 760,554	[2]	$ 610,441
Investment Owned, % of Total Capital (Net Asset Value)		35.92%	[2]	24.96%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 12,761	[2]	$ 28,163
Investment Owned, % of Total Capital (Net Asset Value)		0.60%	[2]	1.15%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 12,761	[2]	$ 28,163
Investment Owned, % of Total Capital (Net Asset Value)		0.60%	[2]	1.15%
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 135,126	[3]	$ 202,415
Investment Owned, % of Total Capital (Net Asset Value)		6.38%	[3]	8.28%
Investment Owned, Underlying Face Amount, at Face Value				$ 160,669
Investment Owned, at Cost				199,037
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 135,126	[3]	$ 202,415
Investment Owned, % of Total Capital (Net Asset Value)		6.38%	[3]	8.28%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,255,000	[3]	$ 160,669
Investment Owned, at Cost		1,606,935	[3]	199,037
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value	[3]	10,470
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value	[3]	134,061
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		10,470
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		134,061
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Swap [Member]
Investment Owned, Fair Value		$ 10,691,012		$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)		42.50%		33.92%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Swap [Member] \| Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value		$ 10,691,012		$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)		42.50%		33.92%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value		$ 18,409,450	[2]	$ 22,854,326
Investment Owned, % of Total Capital (Net Asset Value)		73.18%	[2]	71.81%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		$ 1,301,180	[2]	$ 1,526,456
Investment Owned, % of Total Capital (Net Asset Value)		5.17%	[2]	4.80%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		$ 1,917,605	[2]	$ 1,852,304
Investment Owned, % of Total Capital (Net Asset Value)		7.62%	[2]	5.82%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		$ 3,351,743	[2]	$ 3,191,189
Investment Owned, % of Total Capital (Net Asset Value)		13.32%	[2]	10.03%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value		$ 2,480,920	[2]	$ 3,451,307
Investment Owned, % of Total Capital (Net Asset Value)		9.86%	[2]	10.85%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value		$ 380,111	[2]	$ 3,853,295
Investment Owned, % of Total Capital (Net Asset Value)		1.51%	[2]	12.11%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		$ 509,442	[2]	$ 484,157
Investment Owned, % of Total Capital (Net Asset Value)		2.03%	[2]	1.52%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		$ 3,089,103	[2]	$ 802,570
Investment Owned, % of Total Capital (Net Asset Value)		12.28%	[2]	2.52%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 5,000,417	[2]	$ 7,426,768
Investment Owned, % of Total Capital (Net Asset Value)		19.88%	[2]	23.34%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]	0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		$ 378,929	[2]	$ 266,280
Investment Owned, % of Total Capital (Net Asset Value)		1.51%	[2]	0.84%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 6,230	[3]	$ 1,744,999
Investment Owned, % of Total Capital (Net Asset Value)		0.02%	[3]	5.49%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 6,230	[3]	$ 34,422
Investment Owned, % of Total Capital (Net Asset Value)		0.02%	[3]	0.11%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value				$ 1,710,577
Investment Owned, % of Total Capital (Net Asset Value)				5.38%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value			[3]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[3]
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 65,967	[3]	$ 123,409
Investment Owned, % of Total Capital (Net Asset Value)		0.26%	[3]	0.39%
Investment Owned, Underlying Face Amount, at Face Value				$ 97,958
Investment Owned, at Cost				121,350
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| U.S. Treasury Securities [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 51,113
Investment Owned, at Cost	[3]	65,447
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 65,967	[3]	$ 123,409
Investment Owned, % of Total Capital (Net Asset Value)		0.26%	[3]	0.39%
Investment Owned, Underlying Face Amount, at Face Value				$ 97,958
Investment Owned, at Cost				121,350
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note Six Point Eight Seven Five Percent [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 51,113
Investment Owned, at Cost	[3]	65,447
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value		$ 104,943		$ 158,944
Investment Owned, % of Total Capital (Net Asset Value)		0.40%		0.51%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (7,390)		$ 8,490
Investment Owned, % of Total Capital (Net Asset Value)		(0.03%)		0.03%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 3,030		$ (31,117)
Investment Owned, % of Total Capital (Net Asset Value)		0.01%		(0.10%)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value		$ (3,156)		$ 7,402
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)		0.02%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value		$ 61,445		$ 116,653
Investment Owned, % of Total Capital (Net Asset Value)		0.24%		0.37%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value		$ 14,846		$ 17,226
Investment Owned, % of Total Capital (Net Asset Value)		0.06%		0.05%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value		$ 3,380		$ 48,083
Investment Owned, % of Total Capital (Net Asset Value)		0.01%		0.15%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 6,586		$ 1,094
Investment Owned, % of Total Capital (Net Asset Value)		0.03%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Soft Futures Contracts (Far East) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (5,556)		$ (2,025)
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)		(0.01%)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value		$ 3,686
Investment Owned, % of Total Capital (Net Asset Value)		0.01%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value		$ 5,404
Investment Owned, % of Total Capital (Net Asset Value)		0.02%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 8,686
Investment Owned, % of Total Capital (Net Asset Value)		0.03%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value				$ (5,390)
Investment Owned, % of Total Capital (Net Asset Value)				(0.02%)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Precious Metal Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 15,580
Investment Owned, % of Total Capital (Net Asset Value)		0.06%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Africa) [Member]
Investment Owned, Fair Value		$ (548)
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value		$ 286
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value				$ (1,472)
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value		$ (1,105)		$ 83,916
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.25%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 19,766		$ 6,120
Investment Owned, % of Total Capital (Net Asset Value)		0.08%		0.02%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (15,221)		$ 28,880
Investment Owned, % of Total Capital (Net Asset Value)		(0.06%)		0.09%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (1,170)		$ 25,227
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.08%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value				$ 12,826
Investment Owned, % of Total Capital (Net Asset Value)				0.04%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value				$ 128
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (4,480)		$ (600)
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value				$ 3,027
Investment Owned, % of Total Capital (Net Asset Value)				0.01%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (Canada) [Member]
Investment Owned, Fair Value				$ 9,613
Investment Owned, % of Total Capital (Net Asset Value)				0.03%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value				$ (1,305)
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| CURRENCY FORWARDS [Member]
Investment Owned, Fair Value		$ (61,691)		$ (22,201)
Investment Owned, % of Total Capital (Net Asset Value)		(0.25%)		(0.07%)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| CURRENCY FORWARDS [Member] \| Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value		$ (61,691)		$ (22,201)
Investment Owned, % of Total Capital (Net Asset Value)		(0.25%)		(0.07%)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value		$ 42,147		$ 220,659
Investment Owned, % of Total Capital (Net Asset Value)		0.15%		0.69%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Frontier Trading Companies XXXVIII and XXXIX [Member]
Investment Owned, % of Total Capital (Net Asset Value)		15.96%		13.56%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Swap [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Swap [Member] \| Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value		$ 2,665,985	[2]	$ 3,252,075
Investment Owned, % of Total Capital (Net Asset Value)		72.34%	[2]	84.32%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 1,191,797	[2]	$ 1,954,531
Investment Owned, % of Total Capital (Net Asset Value)		32.34%	[2]	50.68%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		$ 1,474,188	[2]	$ 1,297,544
Investment Owned, % of Total Capital (Net Asset Value)		40.00%	[2]	33.64%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 587,909	[3]	$ 523,180
Investment Owned, % of Total Capital (Net Asset Value)		15.95%	[3]	13.57%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 36,809	[3]	$ 11,463
Investment Owned, % of Total Capital (Net Asset Value)		1.00%	[3]	0.30%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value		$ 551,100	[3]	$ 511,717
Investment Owned, % of Total Capital (Net Asset Value)		14.95%	[3]	13.27%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 389,753	[3]	$ 82,386
Investment Owned, % of Total Capital (Net Asset Value)		10.57%	[3]	2.14%
Investment Owned, Underlying Face Amount, at Face Value				$ 65,395
Investment Owned, at Cost				81,011
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| U.S. Treasury Securities [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 301,992
Investment Owned, at Cost	[3]	386,679
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 389,753	[3]	$ 82,386
Investment Owned, % of Total Capital (Net Asset Value)		10.57%	[3]	2.14%
Investment Owned, Underlying Face Amount, at Face Value				$ 65,395
Investment Owned, at Cost				81,011
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note Six Point Eight Seven Five Percent [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 301,992
Investment Owned, at Cost	[3]	386,679
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Soft Futures Contracts (Far East) [Member]
Investment Owned, Fair Value		$ (1,336)
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Precious Metal Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Africa) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| LONG FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (Canada) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| CURRENCY FORWARDS [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| CURRENCY FORWARDS [Member] \| Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member] \| Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Investment Owned, % of Total Capital (Net Asset Value)		0.30%		52.30%
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Swap [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Swap [Member] \| Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value		$ 5,964,788	[2]
Investment Owned, % of Total Capital (Net Asset Value)		99.14%	[2]
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 5,964,788
Investment Owned, % of Total Capital (Net Asset Value)	[2]	99.14%
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 18,834	[2]	$ 4,292,075
Investment Owned, % of Total Capital (Net Asset Value)		0.31%	[2]	52.29%
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 18,834	[2]	$ 435,000
Investment Owned, % of Total Capital (Net Asset Value)		0.31%	[2]	5.30%
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value				$ 3,857,075
Investment Owned, % of Total Capital (Net Asset Value)				46.99%
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 194,665	[3]	$ 3,126,551
Investment Owned, % of Total Capital (Net Asset Value)		3.24%	[3]	38.09%
Investment Owned, Underlying Face Amount, at Face Value				$ 2,481,736
Investment Owned, at Cost				3,074,369
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| U.S. Treasury Securities [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 150,832
Investment Owned, at Cost	[3]	193,129
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 194,665	[3]	$ 3,126,551
Investment Owned, % of Total Capital (Net Asset Value)		3.24%	[3]	38.09%
Investment Owned, Underlying Face Amount, at Face Value				$ 2,481,736
Investment Owned, at Cost				$ 3,074,369
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| US Treasury Note Six Point Eight Seven Five Percent [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 150,832
Investment Owned, at Cost	[3]	$ 193,129
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Investment Owned, % of Total Capital (Net Asset Value)		0.60%		16.27%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Swap [Member]
Investment Owned, Fair Value		$ 3,036,673	[4]	$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)		75.55%	[4]	66.19%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Swap [Member] \| Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value		$ 3,036,673	[1]	$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)		75.55%	[1]	66.19%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value		$ 2,623,105	[2]	$ 2,167,879
Investment Owned, % of Total Capital (Net Asset Value)		65.26%	[2]	48.55%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,192,146
Investment Owned, % of Total Capital (Net Asset Value)	[2]	29.66%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 1,430,959	[2]	$ 2,167,879
Investment Owned, % of Total Capital (Net Asset Value)		35.60%	[2]	48.55%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 24,242	[2]	$ 726,686
Investment Owned, % of Total Capital (Net Asset Value)		0.60%	[2]	16.27%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 24,242	[2]	$ 61,763
Investment Owned, % of Total Capital (Net Asset Value)		0.60%	[2]	1.38%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| Investment in Unconsolidated Trading Companies [Member] \| Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value				$ 664,923
Investment Owned, % of Total Capital (Net Asset Value)				14.89%
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 256,696	[3]	$ 443,921
Investment Owned, % of Total Capital (Net Asset Value)		6.39%	[3]	9.94%
Investment Owned, Underlying Face Amount, at Face Value				$ 352,367
Investment Owned, at Cost				436,512
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| U.S. Treasury Securities [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 198,896
Investment Owned, at Cost	[3]	254,671
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 256,696	[3]	$ 443,921
Investment Owned, % of Total Capital (Net Asset Value)		6.39%	[3]	9.94%
Investment Owned, Underlying Face Amount, at Face Value				$ 352,367
Investment Owned, at Cost				$ 436,512
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note Six Point Eight Seven Five Percent [Member] \| Additional [Member]
Investment Owned, Fair Value	[3]	$ 198,896
Investment Owned, at Cost	[3]	$ 254,671
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Investment Owned, % of Total Capital (Net Asset Value)		0.03%		5.48%
Frontier Funds [Member] \| Swap [Member]
Investment Owned, Fair Value	[5]	$ 20,044,944		$ 20,149,868
Investment Owned, % of Total Capital (Net Asset Value)	[5]	35.00%		27.98%
Frontier Funds [Member] \| Swap [Member] \| Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 5,881,358		$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)	[5]	10.27%		8.22%
Frontier Funds [Member] \| Swap [Member] \| Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 435,901		$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.76%		0.67%
Frontier Funds [Member] \| Swap [Member] \| Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 10,691,012		$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)	[5]	18.67%		14.99%
Frontier Funds [Member] \| Swap [Member] \| Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 3,036,673		$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)	[5]	5.30%		4.10%
Frontier Funds [Member] \| Private Investment Companies [Member]
Investment Owned, Fair Value	[6]	$ 45,725,137		$ 46,557,428
Investment Owned, % of Total Capital (Net Asset Value)	[6]	79.85%		64.64%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[6]	$ 2,847,337		$ 3,308,411
Investment Owned, % of Total Capital (Net Asset Value)	[6]	4.97%		4.59%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[6]	$ 3,146,329		$ 3,003,247
Investment Owned, % of Total Capital (Net Asset Value)	[6]	5.49%		4.17%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[6]	$ 5,597,455		$ 4,981,003
Investment Owned, % of Total Capital (Net Asset Value)	[6]	9.78%		6.92%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[6]	$ 3,889,473		$ 4,968,683
Investment Owned, % of Total Capital (Net Asset Value)	[6]	6.79%		6.90%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[6]	$ 552,017		$ 5,503,821
Investment Owned, % of Total Capital (Net Asset Value)	[6]	0.96%		7.64%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[6]			$ 930,806
Investment Owned, % of Total Capital (Net Asset Value)	[6]			1.29%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[6]	$ 13,075,038		$ 1,103,278
Investment Owned, % of Total Capital (Net Asset Value)	[6]	22.83%		1.53%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[6]	$ 12,115,010		$ 18,370,991
Investment Owned, % of Total Capital (Net Asset Value)	[6]	21.16%		25.51%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[6]	$ 2,036,068		$ 2,595,925
Investment Owned, % of Total Capital (Net Asset Value)	[6]	3.56%		3.60%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[6]	$ 1,328,816		$ 983,147
Investment Owned, % of Total Capital (Net Asset Value)	[6]	2.32%		1.37%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC [Member]
Investment Owned, Fair Value	[6]	$ 152,963		$ 808,116
Investment Owned, % of Total Capital (Net Asset Value)	[6]	0.27%		1.12%
Frontier Funds [Member] \| Private Investment Companies [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[6]	$ 984,631
Investment Owned, % of Total Capital (Net Asset Value)	[6]	1.72%
Frontier Funds [Member] \| U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 1,619,710		$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)		2.83%		7.89%
Frontier Funds [Member] \| U.S. Treasury Securities [Member] \| US Treasury Note [Member]
Investment Owned, Fair Value		$ 1,619,710		$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)		2.83%		7.89%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[7]	$ 104,943		$ 611,366
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.21%		(0.85%)
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ (7,390)		$ 9,510
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.01%)		0.01%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ 429,385
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.60%)
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value	[7]	$ (3,156)		$ 13,487
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.01%)		0.02%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]	$ 61,445		$ 360,817
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.11%		0.50%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]	$ 14,846		$ 36,092
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.03%		0.50%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]	$ 3,380		$ 78,270
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.01%		0.11%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 6,586		$ 44,250
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.01%		0.06%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Soft Futures Contracts (Far East) [Member]
Investment Owned, Fair Value		$ (1,336)
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ (5,556)		$ (20,705)
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.01%)		(0.03%)
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]	$ 3,686		$ (18,456)
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.01%		(0.03%)
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]	$ 5,404		$ 1,338
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.01%		0.00%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 8,686		$ (75,392)
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.02%		(0.10%)
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ (643,321)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.89%)
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 3,030
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.01%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Precious Metal Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 15,580
Investment Owned, % of Total Capital (Net Asset Value)		3.00%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Africa) [Member]
Investment Owned, Fair Value		$ (548)
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value		$ 286
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ (1,315)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ 14,730
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.02%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various currency futures contracts (Latin America) [Member]
Investment Owned, Fair Value	[7]			$ 42,160
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.06%
Frontier Funds [Member] \| LONG FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]			$ (23,446)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.03%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[7]	$ (1,105)		$ 210,570
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.01%)		0.29%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 19,766		$ 81,243
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.03%		0.11%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ (15,221)		$ 147,521
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.03%)		0.20%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ (79,801)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.11%)
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]			$ (309)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ (35,688)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.05%)
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ (1,170)		$ 22,291
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.00%		0.03%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ 12,826
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.02%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ 62,711
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.09%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ (4,480)		$ 425,052
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.01%)		0.59%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Africa) [Member]
Investment Owned, Fair Value	[7]			$ (1,220)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value	[7]			$ 3,027
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ 400
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various agriculture futures contracts (Canada) [Member]
Investment Owned, Fair Value	[7]			$ 9,817
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.01%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ (226,300)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.31%)
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various stock index futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]			$ 283
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various currency futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ (63,875)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.09%)
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various currency futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]			$ (180,813)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.25%)
Frontier Funds [Member] \| SHORT FUTURES CONTRACTS [Member] \| Various currency futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]			$ 33,405
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.05%
Frontier Funds [Member] \| CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[7]	$ (61,691)		$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.11%)		0.00%
Frontier Funds [Member] \| CURRENCY FORWARDS [Member] \| Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value	[7]	$ (61,691)		$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.11%)		0.00%
Frontier Funds [Member] \| CURRENCY FORWARDS [Member] \| Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[7]			$ (398,189)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.56%)
Frontier Funds [Member] \| Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[7]	$ 42,147
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.09%

[1]	See Note 4 to the Financial Statements.
[2]	See Note 5 to the Financial Statements.
[3]	See Note 2 to the Financial Statements.
[4]	Does not include management and incentive fees at Galaxy Plus.
[5]	See Notes to Consolidated Financial Statements, Note 4.
[6]	See Notes to Consolidated Financial Statements, Note 5.
[7]	Except for those items disclosed, no individual futures, forwards and option on futures contract position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.

Statements of Operations (Unaud

Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
Statements of Operations (Unaudited) - USD ($)	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Frontier Funds [Member]
Investment income:
Interest - net	$ 16,734	$ 56,231	$ 60,906	$ 116,557
Total Income	16,734	56,231	60,906	116,557
Expenses:
Incentive Fees (rebate)				148,409
Management Fees	17,989	230,232	69,666	461,121
Service Fees - Class 1, 1A, 2, 2A	257,901	411,318	549,256	877,098
Risk analysis Fees	(3,820)	20,922	2,872	43,720
Trading Fees	581,958	761,690	1,165,209	1,632,215
Other Fees
Total Expenses	854,028	1,424,162	1,787,003	3,162,563
Investment (loss) - net	(837,294)	(1,367,931)	(1,726,097)	(3,046,006)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	178,497	715,860	(1,098,852)	(38,891)
Net unrealized gain/(loss) on private investment companies	2,025,004	1,333,361	4,859,737	(7,806,201)
Net realized gain/(loss) on private investment companies	127,735	(421,358)	(1,792,671)	423,435
Net change in open trade equity/(deficit)	(19,404)	249,677	506,148	(514,240)
Net unrealized gain/(loss) on swap contracts	244,541	56,022	(104,923)	1,588,330
Net realized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	(43,742)	(112,843)	59,596	(401,667)
Net unrealized gain/(loss) on U.S. Treasury securities	53,004	34,631	(32,268)	21,019
Trading commissions	(9,167)	(32,749)	(20,240)	(51,747)
Net gain/(loss) on investments	2,556,468	1,822,601	2,376,527	(6,779,962)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	1,719,174	454,670	650,430	(9,825,968)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			650,430
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member]
Investment income:
Interest - net	1,134	10,421	6,002	18,038
Total Income	1,134	10,421	6,002	18,038
Expenses:
Incentive Fees (rebate)				1,881
Management Fees		13,229	2,668	24,792
Service Fees - Class 1, 1A, 2, 2A	11,366	14,689	23,395	30,804
Risk analysis Fees
Trading Fees	126,026	143,613	256,330	308,763
Total Expenses	137,392	171,531	282,393	366,240
Investment (loss) - net	(136,258)	(161,110)	(276,391)	(348,202)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	486,940	2,018,592	929,678	71,595
Net realized gain/(loss) on private investment companies	(117,397)	(1,685,616)	(449,834)	(1,526,351)
Net unrealized gain/(loss) on swap contracts	47,593	61,335	(39,055)	513,328
Net realized gain/(loss) on U.S. Treasury securities	(15,661)	(12,780)	(590)	(36,355)
Net unrealized gain/(loss) on U.S. Treasury securities	17,613	2,073	(425)	(3,864)
Change in fair value of investments in unconsolidated trading companies	(1,115)	154,045	(85,613)	4,402
Net gain/(loss) on investments	417,973	537,649	354,161	(977,245)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	281,715	376,539	77,770	(1,325,447)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 281,715	$ 376,539	$ 77,770	$ (1,325,447)
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 1.6	$ 1.77	$ 0.19	$ (8.11)
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	2.42	2.61	1.27	(8.32)
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	2.34	2.5	1.34	(7.59)
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member] \| Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Masters Fund
Investment income:
Interest - net	$ 1,466	$ 8,315	$ 2,156	$ 16,734
Total Income	1,466	8,315	2,156	16,734
Expenses:
Incentive Fees (rebate)
Management Fees	2,072	28,862	7,665	61,211
Service Fees - Class 1, 1A, 2, 2A	2,268	12,929	9,754	27,898
Risk analysis Fees
Trading Fees	58,718	105,998	126,036	240,046
Total Expenses	63,058	147,789	143,455	329,155
Investment (loss) - net	(61,592)	(139,474)	(141,299)	(312,421)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	71,119	1,426,534	135,339	84,407
Net realized gain/(loss) on private investment companies	4,089	(1,368,589)	(99,767)	(1,210,157)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	7,328	(10,945)	5,397	(40,171)
Net unrealized gain/(loss) on U.S. Treasury securities	(458)	(488)	3,472	(17,059)
Change in fair value of investments in unconsolidated trading companies	(6,283)	156,021	(67,510)	(77,334)
Net gain/(loss) on investments	75,795	202,533	(23,069)	(1,260,314)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	14,203	63,059	(164,368)	(1,572,735)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 14,203	$ 63,059	$ (164,368)	$ (1,572,735)
The Series of the Frontier Funds [Member] \| Frontier Masters Fund \| Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (0.86)	$ 1.13	$ (3.77)	$ (15.41)
The Series of the Frontier Funds [Member] \| Frontier Masters Fund \| Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Masters Fund \| Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(0.59)	1.71	(3.58)	(16.89)
The Series of the Frontier Funds [Member] \| Frontier Masters Fund \| Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Masters Fund \| Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(0.50)	1.67	(3.23)	(15.63)
The Series of the Frontier Funds [Member] \| Frontier Masters Fund \| Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund
Investment income:
Interest - net	$ 437	$ 3,424	$ 1,135	$ 7,459
Total Income	437	3,424	1,135	7,459
Expenses:
Incentive Fees (rebate)
Management Fees
Service Fees - Class 1, 1A, 2, 2A	152	407	314	1,064
Risk analysis Fees
Trading Fees	14,365	21,519	28,217	46,212
Total Expenses	14,517	21,926	28,531	47,276
Investment (loss) - net	(14,080)	(18,502)	(27,396)	(39,817)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	304,133	(67,175)	714,483	(152,040)
Net realized gain/(loss) on private investment companies	(156,673)	(82,628)	(702,242)	(164,066)
Net unrealized gain/(loss) on swap contracts	(25,765)	(49,384)	(43,201)	35,886
Net realized gain/(loss) on U.S. Treasury securities	(1,404)	(4,915)	2,705	(29,901)
Net unrealized gain/(loss) on U.S. Treasury securities	3,374	1,444	395	4,012
Change in fair value of investments in unconsolidated trading companies	(469)	(1,870)	(1,029)	(1,812)
Net gain/(loss) on investments	123,196	(204,528)	(28,889)	(307,921)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	109,116	(223,030)	(56,285)	(347,738)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 109,116	$ (223,030)	$ (56,285)	$ (347,738)
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund \| Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund \| Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 2.71	(7.08)	(3.95)	(10.57)
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund \| Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	4.86	(5.91)	(0.30)	(9.29)
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund \| Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	3.28	(7.82)	(4.29)	(11.46)
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund \| Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	5.09	(6.21)	(0.31)	(9.74)
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund \| Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 3.49	$ (8.15)	$ (4.38)	$ (11.88)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund
Investment income:
Interest - net	$ 13,502	$ 8,428	$ 24,862	$ 24,944
Total Income	13,502	8,428	24,862	24,944
Expenses:
Incentive Fees (rebate)				145,134
Management Fees	5,286	22,566	13,365	42,902
Service Fees - Class 1, 1A, 2, 2A	154,061	237,810	324,926	3,529
Risk analysis Fees	1,414	1,692	2,872
Trading Fees	248,123	344,769	527,460	500,791
Total Expenses	408,884	606,837	868,623	1,421,301
Investment (loss) - net	(395,382)	(598,409)	(843,761)	(1,396,357)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	253,372	(257,661)	257,898	(283,336)
Net unrealized gain/(loss) on private investment companies	563,390	858,677	1,466,941	(3,149,240)
Net realized gain/(loss) on private investment companies	(14,004)	(60,632)	(761,338)	236,606
Net change in open trade equity/(deficit)	(94,279)	(187,927)	(196,515)	(77,662)
Net unrealized gain/(loss) on swap contracts	91,290	129,808	(103,896)	1,129,650
Net realized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	11,778	(21,050)	8,349	(44,907)
Net unrealized gain/(loss) on U.S. Treasury securities	(9,616)	3,423	5,068	(6,540)
Trading commissions	(9,167)	(21,312)	(16,232)	(28,937)
Change in fair value of investments in unconsolidated trading companies	(1,360)	296,049	(139,630)	56,484
Net gain/(loss) on investments	791,404	739,375	520,645	(2,167,882)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	396,022	140,966	(323,116)	(3,564,239)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 396,022	$ 140,966	$ (323,116)	$ (3,564,239)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund \| Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 1.46	$ 0.28	$ (1.28)	$ (10.75)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund \| Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	3.62	1.83	0.72	(13.18)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund \| Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	3.22	1.65	0.68	(11.44)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund \| Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	3.13	1.65	0.64	(11.42)
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund \| Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 2.69	$ 1.36	$ 0.54	$ (9.88)
The Series of the Frontier Funds [Member] \| Frontier Select Fund
Investment income:
Interest - net
Total Income
Expenses:
Incentive Fees (rebate)
Management Fees
Service Fees - Class 1, 1A, 2, 2A	26,562	33,273	52,067	72,962
Risk analysis Fees
Trading Fees	22,475	28,109	45,107	72,962
Total Expenses	49,037	61,382	97,174	138,665
Investment (loss) - net	(49,037)	(61,382)	(97,174)	(138,665)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	176,441	57,428	259,209	(961,333)
Net realized gain/(loss) on private investment companies	75,451	(78,570)	24,501	59,566
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	7,688	(4,883)	11,151	(12,538)
Net unrealized gain/(loss) on U.S. Treasury securities	(5,941)	308	(8,678)	(11,835)
Trading commissions
Change in fair value of investments in unconsolidated trading companies	63,183	(42,595)	37,710	(37,017)
Net gain/(loss) on investments	316,822	(68,312)	323,893	(963,157)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	267,785	(129,694)	226,719	(1,101,822)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 267,785	$ (129,694)	$ 226,719	$ (1,101,822)
The Series of the Frontier Funds [Member] \| Frontier Select Fund \| Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 5.27	$ (1.72)	$ 4.62	$ (15.52)
The Series of the Frontier Funds [Member] \| Frontier Select Fund \| Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	8.98	(1.72)	8.78	(21.17)
The Series of the Frontier Funds [Member] \| Frontier Select Fund \| Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Select Fund \| Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] \| Frontier Select Fund \| Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 6.04	$ (1.24)	$ 5.86	$ (15.95)
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly, Frontier Winton Fund)
Investment income:
Interest - net
Total Income
Expenses:
Incentive Fees (rebate)
Management Fees	9,531	131,682	38,679	262,342
Service Fees - Class 1, 1A, 2, 2A	42,779	80,907	94,902	175,167
Risk analysis Fees
Trading Fees	82,598	80,703	125,313	163,278
Total Expenses	134,908	293,292	258,894	600,787
Investment (loss) - net	(134,908)	(293,292)	(258,894)	(600,787)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	865,806		1,553,914
Net realized gain/(loss) on private investment companies	(366,129)		(366,129)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on swap contracts	(51,229)	(50,169)
Net realized gain/(loss) on U.S. Treasury securities			26,444	(205,194)
Net unrealized gain/(loss) on U.S. Treasury securities	43,406	25,139	(29,487)	52,629
Change in fair value of investments in unconsolidated trading companies	(23,742)	646,257	(352,005)	(252,761)
Net gain/(loss) on investments	468,112	621,227	832,737	(405,326)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	333,204	327,935	573,843	(1,006,113)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 333,204	$ 327,935	$ 573,843	$ (1,006,113)
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly, Frontier Winton Fund) \| Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 7.31	$ 4.06	$ 12.07	$ (10.42)
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly, Frontier Winton Fund) \| Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	12	6.62	20.31	(13.03)
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly, Frontier Winton Fund) \| Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 9.63	$ 5.58	$ 16.21	$ (9.25)
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund
Investment income:
Interest - net
Total Income
Expenses:
Incentive Fees (rebate)				1,394
Management Fees	1,100	33,893	7,289	69,874
Service Fees - Class 1, 1A, 2, 2A	20,713	31,302	43,898	68,410
Risk analysis Fees
Trading Fees	29,653	36,855	56,746	79,147
Total Expenses	51,466	102,050	107,933	218,825
Investment (loss) - net	(51,466)	(102,050)	(107,933)	(218,825)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	375,448	22,440	516,272	(519,737)
Net realized gain/(loss) on private investment companies	(67,182)	(83,005)	(73,928)	(81,298)
Net unrealized gain/(loss) on swap contracts	131,423	(85,737)	81,229	(90,533)
Net realized gain/(loss) on swap contracts	(2,242)	(8,100)
Net realized gain/(loss) on U.S. Treasury securities			6,140	(32,599)
Net unrealized gain/(loss) on U.S. Treasury securities	4,626	2,732	(2,613)	3,677
Change in fair value of investments in unconsolidated trading companies	(6,966)	125,470	(63,918)	1,968
Net gain/(loss) on investments	435,107	(26,200)	463,182	(718,522)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	383,641	(128,250)	355,249	(937,347)
Less: Operations attributable to non-controlling interests	(63,719)	(41,569)	39,383	(43,895)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 447,360	$ (86,681)	$ 315,866	$ (893,452)
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund \| Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 9.92	$ (1.82)	$ 9.77	$ (18.52)
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund \| Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	16.5	(1.57)	17.43	(25.16)
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund \| Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 13.9	$ (1.18)	$ 14.56	$ (18.82)

Consolidated Statements of Chan

Consolidated Statements of Changes in Owners' Capital Equity (Unaudited) - 6 months ended Jun. 30, 2019 - USD ($)	Frontier Funds [Member]Managing Owner [Member]	Frontier Funds [Member]Limited Owners [Member]	Frontier Funds [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Diversified Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Diversified Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Masters Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Masters Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Long/Short Commodity Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Long/Short Commodity Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Long/Short Commodity Fund [Member]Class 3a [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Balanced Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Balanced Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Select Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Global Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Heritage Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Diversified Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Diversified Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Diversified Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Masters Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Masters Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Masters Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 1a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 3a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 3a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Select Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Select Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Select Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Global Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Global Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Global Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Heritage Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Heritage Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Heritage Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Non-controlling Interest [Member]Frontier Diversified Fund [Member]	The Series of the Frontier Funds [Member]Non-controlling Interest [Member]Frontier Masters Fund [Member]	The Series of the Frontier Funds [Member]Non-controlling Interest [Member]Frontier Long/Short Commodity Fund [Member]	The Series of the Frontier Funds [Member]Non-controlling Interest [Member]Frontier Balanced Fund [Member]	The Series of the Frontier Funds [Member]Non-controlling Interest [Member]Frontier Select Fund [Member]	The Series of the Frontier Funds [Member]Non-controlling Interest [Member]Frontier Global Fund [Member]	The Series of the Frontier Funds [Member]Non-controlling Interest [Member]Frontier Heritage Fund [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]	The Series of the Frontier Funds [Member]Frontier Long/Short Commodity Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Long/Short Commodity Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Long/Short Commodity Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Frontier Long/Short Commodity Fund [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]
Owners' Capital, Beginning balance at Dec. 31, 2018	$ 851,595	$ 71,161,187	$ 72,012,782	$ 3,005	$ 172,426	$ 51,365	$ 20,019	$ 5,998	$ 20,484	$ 1,253	$ 125,021	$ 251,097	$ 46,368	$ 107,598	$ 46,961	$ 1,703,556	$ 7,669,749	$ 6,607,774	$ 1,484,478	$ 1,241,610	$ 2,774,661	$ 78,098	$ 1,791,417	$ 20,051	$ 165,985	$ 361,921	$ 25,703,922	$ 4,403,354	$ 88,076	$ 893,515	$ 355,112	$ 3,709,130	$ 99,467	$ 1,897	$ 7,755,444	$ 313,167	$ 32,082	$ 3,331,725	$ 573,992	$ 1,006							$ 511,718				$ 16,156,510				$ 5,572,133				$ 2,445,207				$ 31,820,097				$ 3,856,862				$ 8,208,291				$ 4,465,402
Sale of Units (including transfers)
Redemption of Units (including transfers)	(256,000)	(15,145,634)	(15,401,634)		(39,000)	(33,000)		(500)	(4,000)		(43,500)	(69,000)	(10,000)	(52,000)	(15,000)	(37,232)	(1,800,104)	(1,082,206)	(1,343,509)	(81,053)	(408,756)	(19,593)	(135,785)	(2,315)	(54,416)	(54,845)	(5,764,427)	(401,810)	(45,068)	16,647		(353,695)	(34,191)		(2,700,785)	(12,892)		(736,567)	(49,741)												(2,958,542)				(1,866,318)				(271,454)				(6,340,452)				(397,886)				(2,765,677)				(801,308)
Operations attributable to non-controlling interests																																															39,383																												39,383
Transfer of Units In(Out)																(175,458)		175,458									(24,405)	24,405				(9,665)		9,665				(7,458)		7,458
Net increase/(decrease) in Owners' Capital resulting from operations attributable to controlling interests	(191)	650,621	650,430	31	1,270	(1,915)	(642)	(32)	(1,341)	(79)	(195)	(48)	2,346	7,172	3,240	1,975	12,610	61,884	(17,838)	(46,076)	(97,897)	(1,312)	(9,467)	(1,562)	(15,866)	(26,626)	(329,660)	1,050	781	3,535	1,421	210,815	3,264	10,294	529,333	33,869	3,469	244,181	60,228	8,217							315,866				77,770				(164,368)				(56,285)				(323,116)				226,719				573,843				315,866
Owners' Capital, Ending balance at Jun. 30, 2019	$ 595,404	$ 56,666,174	$ 57,261,578	$ 3,036	$ 134,696	$ 16,450	$ 19,377	$ 5,466	$ 15,143	$ 1,174	$ 81,326	$ 182,049	$ 38,714	$ 62,770	$ 35,201	$ 1,492,841	$ 5,882,255	$ 5,762,910	$ 123,131	$ 1,114,481	$ 2,268,008	$ 57,193	$ 1,646,165	$ 16,174	$ 95,703	$ 280,450	$ 19,585,430	$ 4,026,999	$ 43,789	$ 880,403	$ 356,533	$ 3,566,250	$ 68,540	$ 12,191	$ 5,583,992	$ 334,144	$ 35,551	$ 2,839,339	$ 584,479	$ 9,223							$ 551,101				$ 13,275,738				$ 3,541,447				$ 2,117,468				$ 25,156,529				$ 3,685,695				$ 6,016,457				$ 4,019,343
Owners' Capital - Units, Beginning balance at Dec. 31, 2018				25	1,531	477	199	61	307	18	691	1,601	429	575	308	16,661	63,469	58,671	16,296	11,532	27,537	790	17,283	352	2,495	5,180	218,514	24,336	562	5,718	2,647	51,939	919	23	58,946	1,673	214	33,374	3,763	9								16,661	63,494	60,202		16,296	12,008	27,734			851	17,282		218,514	25,027	2,647		51,939	1,348	23		58,946	2,248	214		33,374	4,071	9
Owners' Capital - Units, Redemption of Units (including transfers)					(349)	(319)		(6)	(65)		(243)	(445)	(97)	(272)	(101)	(2,088)	(15,299)	(8,101)	(14,886)	(827)	(4,287)	(209)	(1,354)	(46)	(956)	(895)	(50,190)	(2,169)	(284)	(107)		(5,038)	(334)	115	(20,070)	62		(7,467)	(324)	64
Owners' Capital - Units, Ending balance at Jun. 30, 2019				25	1,182	158	199	55	242	18	448	1,156	332	303	207	14,573	48,170	50,569	1,410	10,705	23,250	581	15,929	306	1,539	4,285	168,324	22,167	278	5,611	2,647	46,901	585	138	38,876	1,611	214	25,907	3,439	73								14,573	48,195	51,751		1,410	10,863	23,449			636	15,929		168,324	22,615	2,647		46,901	917	138		38,876	1,913	214		25,906	3,646	73
Net asset value per unit, Beginning balance at Dec. 31, 2018																$ 102.25	$ 120.84	$ 112.62	$ 91.10	$ 107.68	$ 100.77	$ 98.82	$ 103.66	$ 56.80	$ 66.52	$ 69.83	$ 117.63	$ 180.94	$ 156.81	$ 156.26	$ 134.16	$ 71.41	$ 108.18	$ 82.48	$ 131.57	$ 187.17	$ 149.92	$ 99.83	$ 152.53	$ 111.78
Change in net asset value per unit																0.19	1.27	1.34	(3.77)	(3.58)	(3.23)	(0.30)	(0.31)	(3.95)	(4.29)	(4.38)	(1.27)	0.72	0.68	0.65	0.54	4.62	8.78	5.86	12.07	20.31	16.21	9.77	17.43	14.56
Net asset value per unit, Ending balance at Jun. 30, 2019																$ 102.44	$ 122.11	$ 113.96	$ 87.33	$ 104.10	$ 97.53	$ 98.52	$ 103.34	$ 52.86	$ 62.24	$ 65.45	$ 116.36	$ 181.66	$ 157.49	$ 156.91	$ 134.69	$ 76.03	$ 116.96	$ 88.34	$ 143.64	$ 207.48	$ 166.13	$ 109.60	$ 169.96	$ 126.34

Statements of Cash Flows (Unaud

Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
Statements of Cash Flows (Unaudited) - USD ($)	Jun. 30, 2019	Jun. 30, 2018
Frontier Funds [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	$ 650,430	$ (9,825,968)
Change in:
Net change in open trade equity/(deficit), at fair value	(440,336)	498,388
Net unrealized (gain)/loss on swap contracts	104,923	(1,588,330)
Net unrealized (gain)/loss on U.S. Treasury securities	32,268	(21,019)
Net realized (gain)/loss on U.S. Treasury securities	(59,596)	401,667
Net unrealized (gain)/loss on private investment companies	(4,859,737)	7,806,201
Net realized (gain)/loss on private investment companies	1,792,671	(423,435)
(Purchases) sales of:
Sales of U.S. Treasury securities	12,656,776	(16,729,100)
Purchase of U.S. Treasury securities	(8,596,723)	13,523,255
U.S. Treasury interest and premium paid/amortized	28,153	158,988
Purchase of Private Investment Companies	(22,654,399)	(17,440,372)
Reduction of collateral in Swap contracts		3,100,000
Sale of Private Investment Companies	26,557,496	23,949,869
Increase and/or decrease in:
Interest receivable	84,753	(62,590)
Receivable from related parties		58,146
Other assets	(6,153)
Incentive fees payable to Managing Owner	67,948	(53,036)
Management fees payable to Managing Owner	(69,217)	(15,342)
Interest payable to Managing Owner	(9,222)	(4,502)
Trading fees payable to Managing Owner	(146,967)	(225,266)
Service fees payable to Managing Owner	77,363	89,964
Subscriptions in advance for service fee rebates	66,682
Other liabilities	16,659	(9,653)
Receivable from futures commission merchants	8,286,649	10,869,332
Due from Managing Owner		31,887
Risk analysis fees payable	(17,568)	(4,132)
Net cash provided by (used in) operating activities	13,562,853	14,084,952
Cash Flows from Financing Activities:
Payment for redemption of units	(15,401,634)	(15,595,187)
Redemptions payable	425,517	173,229
Net cash provided by (used in) financing activities	(14,976,117)	(15,421,958)
Net increase (decrease) in cash and cash equivalents	(1,413,264)	(1,337,006)
Cash and cash equivalents, beginning of period	1,729,879	2,695,377
Cash and cash equivalents, end of period	316,615	1,358,371
The Series of the Frontier Funds [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	573,843	(1,006,113)
Change in:
Net change in ownership allocation of U.S. Treasury securities	(1,984,466)	(590,960)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	29,487	(52,629)
Net realized (gain)/loss on U.S. Treasury securities	(26,444)	205,194
Net unrealized (gain)/loss on private investment companies	(1,553,914)
Net realized (gain)/loss on private investment companies	366,129
(Purchases) sales of:
Sales of U.S. Treasury securities	7,982,042	6,903,212
Purchase of U.S. Treasury securities	(3,068,733)	(6,626,880)
U.S. Treasury interest and premium paid/amortized		66,615
Purchase of Private Investment Companies	(4,888,335)
Sale of Private Investment Companies	111,332
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	4,273,691	3,015,420
Interest receivable	60,550	(6,139)
Receivable from related parties		58,146
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner	(42,705)	(11,598)
Interest payable to Managing Owner	(7,464)	(9,431)
Trading fees payable to Managing Owner	(1,231)	(19,924)
Service fees payable to Managing Owner	(4,877)	(5,484)
Subscriptions in advance for service fee rebates	11,786
Other liabilities	8,661	(23,894)
Payables to related parties		(152,219)
Due from Managing Owner
Net cash provided by (used in) operating activities	1,839,352	1,743,316
Cash Flows from Financing Activities:
Payment for redemption of units	(2,765,677)	(2,640,052)
Change in owner redemptions payable	12,892	71,202
Net cash provided by (used in) financing activities	(2,752,785)	(2,568,850)
Net increase (decrease) in cash and cash equivalents	(913,433)	(825,534)
Cash and cash equivalents, beginning of period	951,485	1,403,125
Cash and cash equivalents, end of period	38,052	577,591
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	355,249	(937,347)
Change in:
Net change in ownership allocation of U.S. Treasury securities	(269,385)	198,750
Net unrealized (gain)/loss on swap contracts	(81,229)	90,533
Net unrealized (gain)/loss on U.S. Treasury securities	2,613	(3,677)
Net realized (gain)/loss on U.S. Treasury securities	(6,140)	32,599
Net unrealized (gain)/loss on private investment companies	(516,272)	519,737
Net realized (gain)/loss on private investment companies	73,928	81,298
(Purchases) sales of:
Sales of U.S. Treasury securities	1,153,896	1,096,550
Purchase of U.S. Treasury securities	(693,759)	(1,204,398)
U.S. Treasury interest and premium paid/amortized		10,909
Purchase of Private Investment Companies	(728,774)	(624,245)
Sale of Private Investment Companies	715,892	629,348
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	702,444	655,422
Interest receivable	4,013	1,902
Receivable from related parties
Incentive fees payable to Managing Owner	697
Management fees payable to Managing Owner	(9,201)	(4,033)
Interest payable to Managing Owner	(603)	(646)
Trading fees payable to Managing Owner	278	(4,752)
Service fees payable to Managing Owner	(444)	(3,548)
Subscriptions in advance for service fee rebates	6,996
Other liabilities	1,495	8,106
Payables to related parties
Due from Managing Owner
Net cash provided by (used in) operating activities	711,694	542,508
Cash Flows from Financing Activities:
Payment for redemption of units	(801,308)	(709,855)
Change in owner redemptions payable	4,696
Net cash provided by (used in) financing activities	(796,612)	(709,855)
Net increase (decrease) in cash and cash equivalents	(84,918)	(167,347)
Cash and cash equivalents, beginning of period	135,096	259,161
Cash and cash equivalents, end of period	50,178	91,814
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(323,116)	(3,564,239)
Change in:
Net change in open trade equity/(deficit), at fair value	178,512	61,810
Net change in ownership allocation of U.S. Treasury securities	1,389,637	(838,524)
Net unrealized (gain)/loss on swap contracts	103,896	(1,129,650)
Net unrealized (gain)/loss on U.S. Treasury securities	(5,068)	6,540
Net realized (gain)/loss on U.S. Treasury securities	(8,349)	44,907
Net unrealized (gain)/loss on private investment companies	(1,466,941)	3,149,240
Net realized (gain)/loss on private investment companies	761,338	(236,606)
(Purchases) sales of:
Sales of U.S. Treasury securities	728,520	1,519,248
Purchase of U.S. Treasury securities	(2,072,160)	(3,228,823)
U.S. Treasury interest and premium paid/amortized	24,862	31,901
Purchase of Private Investment Companies	(8,269,446)	(5,716,331)
Reduction of collateral in Swap contracts		2,000,000
Sale of Private Investment Companies	13,419,925	7,996,499
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,738,769	732,257
Interest receivable	1,224	(50,921)
Incentive fees payable to Managing Owner		(40,189)
Management fees payable to Managing Owner	(5,089)	130
Interest payable to Managing Owner	(1,490)	4,289
Trading fees payable to Managing Owner	(25,695)	(30,220)
Service fees payable to Managing Owner	(11,564)	(23,581)
Subscriptions in advance for service fee rebates	38,353
Other liabilities	192	29,253
Receivable from futures commission merchants	(285,900)	5,098,083
Due from Managing Owner		184,106
Risk analysis fees payable	867	(198)
Net cash provided by (used in) operating activities	5,911,277	5,998,981
Cash Flows from Financing Activities:
Payment for redemption of units	(6,340,452)	(5,828,511)
Change in owner redemptions payable	404,514	(21,260)
Net cash provided by (used in) financing activities	(5,935,938)	(5,849,771)
Net increase (decrease) in cash and cash equivalents	(24,661)	149,210
Cash and cash equivalents, beginning of period	37,556	164,332
Cash and cash equivalents, end of period	12,895	313,542
The Series of the Frontier Funds [Member] \| Frontier Select Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	226,719	(1,101,822)
Change in:
Net change in open trade equity/(deficit), at fair value
Net change in ownership allocation of U.S. Treasury securities	(483,648)	490,040
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	8,678	11,835
Net realized (gain)/loss on U.S. Treasury securities	(11,151)	12,538
Net unrealized (gain)/loss on private investment companies	(259,209)	961,333
Net realized (gain)/loss on private investment companies	(24,501)	(59,566)
(Purchases) sales of:
Sales of U.S. Treasury securities	711,661	421,844
Purchase of U.S. Treasury securities	(532,907)	(899,134)
U.S. Treasury interest and premium paid/amortized		6,817
Purchase of Private Investment Companies	(986,377)	(2,177,315)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	1,856,177	3,206,205
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	(64,729)	58,711
Interest receivable	(6,102)	557
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner
Interest payable to Managing Owner	335	(378)
Trading fees payable to Managing Owner	(692)	(5,879)
Service fees payable to Managing Owner	(363)	(4,748)
Subscriptions in advance for service fee rebates	3,071
Other liabilities	8,624	(865)
Receivable from futures commission merchants
Due from Managing Owner
Risk analysis fees payable
Net cash provided by (used in) operating activities	445,586	920,173
Cash Flows from Financing Activities:
Payment for redemption of units	(397,886)	(993,005)
Change in owner redemptions payable	3,415
Net cash provided by (used in) financing activities	(394,471)	(993,005)
Net increase (decrease) in cash and cash equivalents	51,115	(72,832)
Cash and cash equivalents, beginning of period	25,072	114,973
Cash and cash equivalents, end of period	76,187	42,141
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	77,770	(1,325,447)
Change in:
Net change in ownership allocation of U.S. Treasury securities	1,441,552	(425,459)
Net unrealized (gain)/loss on swap contracts	39,055	(513,328)
Net unrealized (gain)/loss on U.S. Treasury securities	425	3,864
Net realized (gain)/loss on U.S. Treasury securities	590	36,355
Net unrealized (gain)/loss on private investment companies	(929,678)	1,526,351
Net realized (gain)/loss on private investment companies	449,834	(71,595)
(Purchases) sales of:
Sales of U.S. Treasury securities	1,406,847	1,223,057
Purchase of U.S. Treasury securities	(1,487,212)	(1,841,423)
U.S. Treasury interest and premium paid/amortized		18,064
Purchase of Private Investment Companies	(4,595,325)	(2,709,650)
Reduction of collateral in Swap contracts	1	1,100,000
Sale of Private Investment Companies	4,959,128	3,903,152
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,142,867	967,760
Interest receivable	28,193	(20,732)
Receivable from related parties
Other assets	(6,153)
Incentive fees payable to Managing Owner	6,380	(12,847)
Management fees payable to Managing Owner	(3,875)	99
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(7,845)	(14,577)
Service fees payable to Managing Owner	(2,034)	(807)
Subscriptions in advance for service fee rebates	2,675
Other liabilities		(24,866)
Net cash provided by (used in) operating activities	2,523,195	1,817,971
Cash Flows from Financing Activities:
Payment for redemption of units	(2,958,542)	(1,832,218)
Change in owner redemptions payable
Net cash provided by (used in) financing activities	(2,958,542)	(1,832,218)
Net increase (decrease) in cash and cash equivalents	(435,347)	(14,247)
Cash and cash equivalents, beginning of period	472,695	189,890
Cash and cash equivalents, end of period	37,348	175,643
The Series of the Frontier Funds [Member] \| Frontier Masters Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(164,368)	(1,572,735)
Change in:
Net change in ownership allocation of U.S. Treasury securities	155,629	1,352,179
Net unrealized (gain)/loss on U.S. Treasury securities	(3,472)	17,059
Net realized (gain)/loss on U.S. Treasury securities	(5,397)	40,171
Net unrealized (gain)/loss on private investment companies	(135,339)	1,210,157
Net realized (gain)/loss on private investment companies	(99,767)	(84,407)
(Purchases) sales of:
Sales of U.S. Treasury securities	154,803	1,349,480
Purchase of U.S. Treasury securities	(537,781)	(2,041,104)
U.S. Treasury interest and premium paid/amortized	2,156	16,569
Purchase of Private Investment Companies	(1,805,043)	(2,398,470)
Sale of Private Investment Companies	3,618,017	4,196,296
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	738,593	479,590
Interest receivable	(4,593)	13,797
Receivable from related parties
Other assets		2,974
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner	(8,347)	60
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(13,028)	(18,180)
Service fees payable to Managing Owner	(1,549)	(915)
Subscriptions in advance for service fee rebates	3,665
Other liabilities	1,305	2,100
Net cash provided by (used in) operating activities	1,895,485	2,564,621
Cash Flows from Financing Activities:
Payment for redemption of units	(1,866,318)	(2,995,839)
Change in owner redemptions payable		112,593
Net cash provided by (used in) financing activities	(1,866,318)	(2,883,246)
Net increase (decrease) in cash and cash equivalents	29,167	(318,625)
Cash and cash equivalents, beginning of period	46,374	411,695
Cash and cash equivalents, end of period	75,541	93,070
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(56,285)	(347,738)
Change in:
Net change in ownership allocation of U.S. Treasury securities	(245,581)	(186,271)
Net unrealized (gain)/loss on swap contracts	43,201	(35,886)
Net unrealized (gain)/loss on U.S. Treasury securities	(395)	(4,012)
Net realized (gain)/loss on U.S. Treasury securities	(2,705)	29,901
Net unrealized (gain)/loss on private investment companies	(714,483)	164,066
Net realized (gain)/loss on private investment companies	702,242	152,040
(Purchases) sales of:
Sales of U.S. Treasury securities	519,007	1,009,865
Purchase of U.S. Treasury securities	(204,172)	(887,337)
U.S. Treasury interest and premium paid/amortized	1,135	8,360
Purchase of Private Investment Companies	(951,165)	(802,678)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	1,067,767	1,418,369
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	15,401	3,567
Interest receivable	1,468	(1,057)
Receivable from related parties
Other assets		(6,779)
Incentive fees payable to Managing Owner	60,871
Management fees payable to Managing Owner
Interest payable to Managing Owner		81
Trading fees payable to Managing Owner	(513)	(2,545)
Service fees payable to Managing Owner	(47)	(144)
Subscriptions in advance for service fee rebates
Other liabilities	521
Net cash provided by (used in) operating activities	236,268	511,802
Cash Flows from Financing Activities:
Payment for redemption of units	(271,454)	(610,125)
Change in owner redemptions payable		10,694
Net cash provided by (used in) financing activities	(271,454)	(599,431)
Net increase (decrease) in cash and cash equivalents	(35,186)	(87,629)
Cash and cash equivalents, beginning of period	61,600	152,200
Cash and cash equivalents, end of period	$ 26,414	$ 64,571

Organization and Purpose

Organization and Purpose	6 Months Ended
Organization and Purpose	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Organization and Purpose	1. Organization and Purpose Frontier Funds, which is referred to in this report as the “Trust”, was formed on August 8, 2003, as a Delaware statutory trust. Please refer to the consolidated financial statements of the Trust included within this periodic report. The Trust is a multi-advisor commodity pool, as described in Commodity Futures Trading Commission (the “CFTC”) Regulation § 4.10(d)(2). The Trust has authority to issue separate series, or each, a Series, of units of beneficial interest (the “Units”) pursuant to the requirements of the Delaware Statutory Trust Act, as amended (the “Trust Act”). The assets of each Series are valued and accounted for separately from the assets of other Series. The Trust is not registered as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). It is managed by Frontier Fund Management LLC (the “Managing Owner”). Purchasers of Units are limited owners of the Trust (“Limited Owners”) with respect to beneficial interests of the Series’ Units purchased. The Trust Act provides that, except as otherwise provided in the second amended and restated declaration of trust and trust agreement dated December 9, 2013, as further amended, by and among the Managing Owner, Wilmington Trust Company as trustee and the unitholders, and may be amended from time to time (“Trust Agreement”), unitholders of the Trust will have the same limitation of liability as do stockholders of private corporations organized under the General Corporation Law of the State of Delaware. The Trust Agreement confers substantially the same limited liability, and contains the same limited exceptions thereto, as would a limited partnership agreement for a Delaware limited partnership engaged in like transactions as the Trust. In addition, pursuant to the Trust Agreement, the Managing Owner of the Trust is liable for obligations of a Series in excess of that Series’ assets. Limited Owners do not have any such liability. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of the combined Series of the Trust. The Trust has been organized to pool investor funds for the purpose of trading in the United States (“U.S.”) and international markets for currencies, interest rates, stock indices, agricultural and energy products, precious and base metals and other commodities. The Trust may also engage in futures contracts, forwards, option contracts and other interest in derivative instruments, including swap contracts. The Trust has seven (7) separate and distinct Series of Units issued and outstanding: Frontier Diversified Fund, Frontier Masters Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund (formerly Frontier Winton Fund), and Frontier Heritage Fund (each a “Series” and collectively, the “Series”). The Trust, with respect to the Series, may issue additional Series of Units. The Trust, with respect to each Series: ● engages in the speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts), and may, from time to time, engage in cash and spot transactions; ● allocates funds to a limited liability trading company or companies (“Trading Company” or “Trading Companies”) and Galaxy Plus entities (“Galaxy Plus”). Except as otherwise described in these notes, each Trading Company and Galaxy Plus entity has one-year renewable contracts with its own independent commodity trading advisor (s), or each, a Trading Advisor, that will manage all or a portion of such Trading Company’s and Galaxy Plus entity’s assets and make the trading decisions for the assets of each Series invested in such Trading Company and Galaxy Plus entity. Each Trading Company and Galaxy Plus entity will segregate its assets from any other Trading Company and Galaxy Plus entity; ● maintains separate, distinct records for each Series, and accounts for the assets of each Series separately from the other Series; ● calculates the Net Asset Value (“NAV”) of its Units for each Series separately from the other Series; ● has an investment objective of increasing the value of each Series’ Units over the long term (capital appreciation), while managing risk and volatility; further, to offer exposure to the investment programs of individual Trading Advisors and to specific instruments; ● maintains each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 or Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund, and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series. Class 1AP was created as a sub-class of Class 1 and it has been presented separately because the fees applicable to it are different from those applicable to Class 1. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents; and ● all payments made to selling agents who are members of the Financial Industry Regulatory Authority, Inc. (“FINRA”) and their associated persons that constitute underwriting compensation will be subject to the limitations set forth in Rule 2310(b)(4)(B)(ii) (formerly Rule 2810(b)(4)(B)(ii)) of the Conduct Rules of FINRA (“Rule 2310”). An investor’s Class 1 Units or Class 2 Units of any Series, or Class 1a Units or Class 2a Units of the Frontier Long/Short Commodity Fund or Frontier Balanced Fund will be classified as Class 3 or Class 3a Units of such Series, as applicable, when the Managing Owner determines that the fee limitation set forth in Rule 2310 with respect to such Units has been reached or will be reached. The service fee limit applicable to each unit sold is reached upon the earlier of when (i) the aggregate initial and ongoing service fees received by the selling agent with respect to such unit equals 9% of the purchase price of such unit or (ii) the aggregate underwriting compensation (determined in accordance with FINRA Rule 2310) paid in respect of such unit totals 10% of the purchase price of such unit. No service fees are paid with respect to Class 3 or Class 3a Units. Units of any Class in a Series may be redeemed, in whole or in part, on a daily basis, at the then current NAV per Unit for such Series on the day of the week after the date the Managing Owner is in receipt of a redemption request for at least one (1) business day to be received by the Managing Owner prior to 4:00 PM in New York. The assets of any particular Series include only those funds and other assets that are paid to, held by or distributed to the Trust, with respect to the Series, on account of and for the benefit of that Series. Under the “Inter-Series Limitation on Liability” expressly provided for under Section 3804(a) of the Trust Act, separate and distinct records of the cash and equivalents, although pooled for maximizing returns, are maintained in the books and records of each Series. As of June 30, 2019, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund separates Units into three separate Classes—Class 1, Class 2, and Class 3. The Trust, with respect to the Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund separates Units into a maximum of three separate Classes—Class 1, Class 2 and Class 1AP. The Trust, with respect to the Frontier Balanced Fund separates Units into a maximum of five separate Classes—Class 1, Class 1AP, Class 2, Class 2A and Class 3A. The Trust, with respect to the Frontier Long/Short Commodity Fund separates Units into a maximum of five separate Classes—Class 1A, Class 2A, Class 2, Class 3A and Class 3. Between April 15, 2016 and May 10, 2017, a portion of the interests in Frontier Trading Company I, LLC and all of the interests in Frontier Trading Company VII, LLC, Frontier Trading Company XV, LLC, and Frontier Trading Company XXIII LLC held by Frontier Diversified Fund, Frontier Masters Fund, Frontier Select Fund, Frontier Balanced Fund and Frontier Long/Short Commodity Fund were exchanged for equivalent interests in the Galaxy Plus Managed Account Platform (“Galaxy Plus”) which is an unaffiliated, third-party managed account platform. The assets of Frontier Trading Company I, LLC, which included exposure to Quantmetrics Capital Management LLP’s Multi-Strategy Program, Quantitative Investment Management, LLC’s Quantitative Global Program, Quest Partners LLC’s Quest Tracker Index Program, Chesapeake Capital Management, LLC’s Diversified Program, and Doherty Advisors LLC’s Relative Value Moderate Program, the assets of Frontier Trading Company VII, LLC, which included exposure to Emil van Essen LLC’s Multi-Strategy Program, Red Oak Commodity Advisors, Inc.’s Fundamental Diversified Program, Rosetta Capital Management, LLC’s Rosetta Trading Program, and Landmark Trading Company’s Landmark Program, the assets of Frontier Trading Company XV, LLC, which included exposure to Transtrend B.V.’s TT Enhanced Risk (USD) Program, and the assets of Frontier Trading Company XXIII, LLC which included exposure to Fort L.P.’s Global Contrarian Program have been transferred to individual Delaware limited liability companies (“Master Funds”) in Galaxy Plus. Each Master Fund is sponsored and operated by Gemini Alternative Funds, LLC (“Sponsor”). The Sponsor has contracted with the Trading Advisors to manage the portfolios of the Master Funds pursuant to the advisors’ respective program. For those Series that invest in Galaxy Plus, approximately 30-70% of those Series assets are used to support the margin requirements of the Master Funds. The remaining assets of the Series are split between investments in Trading Companies and a pooled cash management account that invests primarily in U.S. Treasury securities. For those Series that do not invest in Galaxy Plus, their assets are split between investments in Trading Companies and investments in the pooled cash management account. Each of the Series has invested a portion of its assets in several different Trading Companies or Galaxy Plus entities and one or more Trading Advisors may manage the assets invested in such Trading Companies or Galaxy Plus entities. The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, currency trading companies, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct.
Frontier Funds [Member]
Organization and Purpose	1. Organization and Purpose Frontier Funds, which is referred to in this report as the “Trust”, was formed on August 8, 2003, as a Delaware statutory trust and is set to expire on December 31, 2053. The Trust is a multi-advisor commodity pool, as described in CFTC Regulation § 4.10(d)(2). The Trust has authority to issue separate Series of Units pursuant to the requirements of the Trust Act. The assets of each Series are valued and accounted for separately from the assets of other Series. The Trust is not registered as an investment company under the Investment Company Act. It is managed by the Managing Owner. Purchasers of Units are Limited Owners of the Trust with respect to beneficial interests of the Series’ Units purchased. The Trust Act provides that, except as otherwise provided in the second amended and restated declaration of trust and trust agreement dated December 9, 2013, as further amended, by and among the Managing Owner, Wilmington Trust Company as trustee and the unitholders, as amended from time to time (the “Trust Agreement”), unitholders of the Trust will have the same limitation of liability as do stockholders of private corporations organized under the General Corporation Law of the State of Delaware. The Trust Agreement confers substantially the same limited liability, and contains the same limited exceptions thereto, as would a limited partnership agreement for a Delaware limited partnership engaged in like transactions as the Trust. In addition, pursuant to the Trust Agreement, the Managing Owner of the Trust is liable for obligations of a Series in excess of that Series’ assets. Limited Owners do not have any such liability. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of all Series. The Trust has been organized to pool investor funds for the purpose of trading in the U.S. and international markets for currencies, interest rates, stock indices, agricultural and energy products, precious and base metals and other commodities. The Trust may also engage in futures contracts, forwards, option contracts and other interest in derivative instruments, including swap contracts. The Trust has seven (7) separate and distinct Series of Units issued and outstanding: Frontier Diversified Fund, Frontier Masters Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund (Formerly Frontier Winton Fund), and Frontier Heritage Fund. The Trust financial statements are comprised of unitized Series which are consolidated into the Trust financial statements. However, the consolidated Trust does not issue units. The Trust, with respect to each Series: ● engages in the speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts), and may, from time to time, engage in cash and spot transactions; ● allocates funds to a limited liability trading company or companies (“Trading Company” or “Trading Companies”) and Galaxy Plus entities (“Galaxy Plus”). Except as otherwise described in these notes, each Trading Company and Galaxy Plus entity has one-year renewable contracts with its own independent commodity trading advisor(s), or each, a Trading Advisor, that will manage all or a portion of such Trading Company’s and Galaxy Plus entity’s assets and make the trading decisions for the assets of each Series invested in such Trading Company and Galaxy Plus entity. Each Trading Company and Galaxy Plus entity will segregate its assets from any other Trading Company and Galaxy Plus entity; ● maintains separate, distinct records for each Series, and accounts for the assets of each Series separately from the other Series; ● calculates the Net Asset Value (“NAV”) of its Units for each Series separately from the other Series; ● has an investment objective of increasing the value of each Series’ Units over the long term (capital appreciation), while managing risk and volatility; further, to offer exposure to the investment programs of individual Trading Advisors and to specific instruments; ● maintains each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 or Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund, and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series. Class 1AP was created as a sub-class of Class 1 and it has been presented separately because the fees applicable to it are different from those applicable to Class 1. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents; and ● all payments made to selling agents who are members of the Financial Industry Regulatory Authority, Inc. (“FINRA”) and their associated persons that constitute underwriting compensation will be subject to the limitations set forth in Rule 2310(b)(4)(B)(ii) (formerly Rule 2810(b)(4)(B)(ii)) of the Conduct Rules of FINRA (“Rule 2310”). An investor’s Class 1 Units or Class 2 Units of any Series, or Class 1a Units or Class 2a Units of the Frontier Long/Short Commodity Fund or Frontier Balanced Fund will be classified as Class 3 or Class 3a Units of such Series, as applicable, when the Managing Owner determines that the fee limitation set forth in Rule 2310 with respect to such Units has been reached or will be reached. The service fee limit applicable to each unit sold is reached upon the earlier of when (i) the aggregate initial and ongoing service fees received by the selling agent with respect to such unit equals 9% of the purchase price of such unit or (ii) the aggregate underwriting compensation (determined in accordance with FINRA Rule 2310) paid in respect of such unit totals 10% of the purchase price of such unit. No service fees are paid with respect to Class 3 or Class 3a Units. Units of any Class in a Series may be redeemed, in whole or in part, on a daily basis, at the then current NAV per Unit for such Series on the day of the week after the date the Managing Owner is in receipt of a redemption request for at least one (1) business day to be received by the Managing Owner prior to 4:00 PM in New York. The assets of any particular Series include only those funds and other assets that are paid to, held by or distributed to the Trust on account of and for the benefit of that Series. Under the “Inter-Series Limitation on Liability” expressly provided for under Section 3804(a) of the Trust Act, separate and distinct records of the cash and equivalents, although pooled for maximizing returns, are maintained in the books and records of each Series. As of June 30, 2019, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund, separates Units into three separate Classes—Class 1, Class 2, and Class 3. The Trust, with respect to the Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund separates Units into a maximum of three separate Classes – Class 1, Class 2 and Class 1AP. The Trust, with respect to the Frontier Balanced Fund separates Units into a maximum of five separate Classes— Class 1, Class 1AP, Class 2, Class 2A and Class 3A. The Trust, with respect to the Frontier Long/Short Commodity Fund separates Units into a maximum of five separate Classes— Class 1A, Class 2A, Class 2, Class 3A and Class 3. Between April 15, 2016 and May 10, 2017, a portion of the interests in Frontier Trading Company I, LLC and all of the interests in Frontier Trading Company VII, LLC, Frontier Trading Company XV, LLC, and Frontier Trading Company XXIII LLC held by Frontier Diversified Fund, Frontier Masters Fund, Frontier Select Fund, Frontier Balanced Fund and Frontier Long/Short Commodity Fund were exchanged for equivalent interests in the Galaxy Plus Managed Account Platform (“Galaxy Plus”) which is an unaffiliated, third-party managed account platform. The assets of Frontier Trading Company I, LLC, which included exposure to Quantmetrics Capital Management LLP’s Multi-Strategy Program, Quantitative Investment Management, LLC’s Quantitative Global Program, Quest Partners LLC’s Quest Tracker Index Program, Chesapeake Capital Management, LLC’s Diversified Program, and Doherty Advisors LLC’s Relative Value Moderate Program, the assets of Frontier Trading Company VII, LLC, which included exposure to Emil van Essen LLC’s Multi-Strategy Program, Red Oak Commodity Advisors, Inc.’s Fundamental Diversified Program, Rosetta Capital Management, LLC’s Rosetta Trading Program, and Landmark Trading Company’s Landmark Program, the assets of Frontier Trading Company XV, LLC, which included exposure to Transtrend B.V.’s TT Enhanced Risk (USD) Program, and the assets of Frontier Trading Company XXIII, LLC which included exposure to Fort L.P.’s Global Contrarian Program have been transferred to individual Delaware limited liability companies (“Master Funds”) in Galaxy Plus. Each Master Fund is sponsored and operated by Gemini Alternative Funds, LLC (“Sponsor”). The Sponsor has contracted with the Trading Advisors to manage the portfolios of the Master Funds pursuant to the advisors’ respective program. For those Series that invest in Galaxy Plus, approximately 30-70% of those Series assets are used to support the margin requirements of the Master Funds. The remaining assets of the Series are split between investments in Trading Companies and a pooled cash management account that invests primarily in U.S. Treasury securities. For those Series that do not invest in Galaxy Plus, their assets are split between investments in Trading Companies and investments in the pooled cash management account. Each of the Series has invested a portion of its assets in several different Trading Companies or Galaxy Plus entities and one or more Trading Advisors may manage the assets invested in such Trading Companies or Galaxy Plus entities. The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, currency trading companies, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
Significant Accounting Policies	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Significant Accounting Policies	2. Significant Accounting Policies The following are the significant accounting policies of the Series of the Trust. Basis of Presentation Consolidation Investments in Trading Companies in which a Series does not have a controlling and majority interest and all interests in Galaxy Plus entities are accounted for using net asset value as the practical expedient, which approximates fair value. Fair value represents the proportionate share of the Series’ interest in the NAV in a Trading Company or Galaxy Plus entity. The equity interest held by Series of the Trust is shown as investments in unconsolidated Trading Companies or investments in private investment companies in the statements of financial condition. The income or loss attributable thereto in proportion of investment level is shown in the statements of operations as change in fair value of investments in unconsolidated Trading Companies or net unrealized gain/(loss) on private investment companies. Galaxy Plus entities are co-mingled investment vehicles. In addition to the Series, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series’ ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies. Use of Estimates— Cash and Cash Equivalents— Interest Income— U.S. Treasury Securities— Fair Value Measurements and Disclosures (“ Receivable From Futures Commission Merchants Investment Transactions— Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest is recognized in the period earned and the instruments are marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the statements of operations. Purchase and Sales of Private Investment Companies Foreign Currency Transactions — Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific Series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities. Investments and Swaps Income Taxes Income Taxes In the opinion of the Managing Owner, (i) the Trust, with respect to the Series, is treated as a partnership for federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Units of the Trust. Fees and Expenses Incentive Fee (rebate)— Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $23,105, $31,765, $136, $296,547, $14,233, $145,067 and $53,155 for the Frontier Diversified, Masters, Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively, as of June 30, 2019 and $20,430, $28,100, none, $258,194, $11,162, $133,281 and $46,159 respectively, as of December 31, 2018. These service fees are part of the offering costs of the Trust, with respect to the Series, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. Pending Owner Additions— Owner redemptions payable— Recently Issued Accounting Pronouncements— Subsequent Events Subsequent Events
Frontier Funds [Member]
Significant Accounting Policies	2. Significant Accounting Policies The following are the significant accounting policies of the Trust. Basis of Presentation Consolidation Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies. Use of Estimates— Cash and Cash Equivalents— Interest Income— U.S. Treasury Securities— Fair Value Measurements and Disclosures (“ Receivable from Futures Commission Merchants— Investment Transactions— Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the consolidated statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest was recognized in the period earned and the instruments were marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the consolidated statements of operations. Purchase and Sales of Private Investment Companies Foreign Currency Transactions— Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust, or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities. Investments and Swaps— Income Taxes Income Taxes In the opinion of the Managing Owner, (i) the Trust is treated as a partnership for Federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material Federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Series Units of the Trust. Fees and Expenses— Incentive Fee (rebate)— Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $497,326 and $564,008 as of December 31, 2018 and June 30, 2019, respectively. These service fees are part of the offering costs of the Trust, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. Pending Owner Additions Owner redemptions payable— Recently Issued Accounting Pronouncements— Subsequent Events Subsequent Events

Fair Value Measurements

Fair Value Measurements	6 Months Ended
Fair Value Measurements	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Fair Value Measurements	3. Fair Value Measurements In connection with the valuation of investments the Series apply ASC 820. ASC 820 provides clarification that when a quoted price in an active market for the identical asset or liability is not available, a reporting entity is required to measure fair value using certain techniques. ASC 820 also clarifies that when estimating the fair value of an asset or liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the existence of a restriction that prevents the transfer of an asset or liability. ASC 820 also clarifies that both a quoted price in an active market for the identical asset or liability at the measurement date and the quoted price for the identical asset or liability when traded as an asset in an active market when no adjustments to the quoted price of the asset are required are Level 1 fair value measurements. Level 1 Inputs Unadjusted quoted prices in active markets for identical financial assets that the reporting entity has the ability to access at the measurement date. Level 2 Inputs Inputs other than quoted prices included in Level 1 that are observable for the financial assets or liabilities, either directly or indirectly. These might include quoted prices for similar financial assets in active markets, quoted prices for identical or similar financial assets in markets that are not active, inputs other than quoted prices that are observable for the financial assets or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs Unobservable inputs for determining the fair value of financial assets that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the financial asset. The Trust, with respect to the Series, uses the following methodologies to value instruments within its financial asset portfolio at fair value: Trading Securities. Swap Contracts. Investment in Unconsolidated Trading Companies. Investments in Private Investment Companies The following table summarizes investment in each Series measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. Level 1 Level 2 Level 3 Total June 30, 2019 Inputs Inputs Inputs Fair Value Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 18,043 $ - $ - $ 18,043 Swap Contracts - - 5,881,358 5,881,358 U.S. Treasury Securities 191,059 - - 191,059 Frontier Masters Fund Investment in Unconsolidated Trading Companies 36,495 - - 36,495 U.S. Treasury Securities 386,444 - - 386,444 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 12,761 - - 12,761 Swap Contracts - - 435,901 435,901 U.S. Treasury Securities 135,126 - - 135,126 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 6,230 - - 6,230 Open Trade Equity (Deficit) 103,838 (61,691 ) - 42,147 Swap Contracts - - 10,691,012 10,691,012 U.S. Treasury Securities 65,967 - - 65,967 Frontier Select Fund Investment in Unconsolidated Trading Companies 36,809 - 551,100 587,909 U.S. Treasury Securities 389,753 - - 389,753 Frontier Global Fund Investment in Unconsolidated Trading Companies 18,384 - - 18,384 U.S. Treasury Securities 194,665 - - 194,665 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 24,242 - - 24,242 Swap Contracts - - 3,036,673 3,036,673 U.S. Treasury Securities 256,696 - - 256,696 Level 1 Level 2 Level 3 Total December 31, 2018 Inputs Inputs Inputs Fair Value Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 1,157,971 $ 2,939 $ - $ 1,160,910 Swap Contracts - - 5,920,414 5,920,414 U.S. Treasury Securities 1,553,261 - - 1,553,261 Frontier Masters Fund Investment in Unconsolidated Trading Companies 772,732 2,356 - 775,088 U.S. Treasury Securities 152,384 - - 152,384 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 28,163 - - 28,163 Swap Contracts - - 479,102 479,102 U.S. Treasury Securities 202,415 - - 202,415 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 1,739,609 5,390 - 1,744,999 Open Trade Equity (Deficit) 242,860 (22,201 ) - 220,659 Swap Contracts - - 10,794,908 10,794,908 U.S. Treasury Securities 123,409 - - 123,409 Frontier Select Fund Investment in Unconsolidated Trading Companies 11,462 - 511,718 523,180 U.S. Treasury Securities 82,386 - - 82,386 Frontier Global Fund (formerly Frontier Winton Fund) Investment in Unconsolidated Trading Companies 4,280,023 12,052 - 4,292,075 U.S. Treasury Securities 3,126,551 - - 3,126,551 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 724,614 2,072 - 726,686 Swap Contracts - - 2,955,444 2,955,444 U.S. Treasury Securities 443,921 - - 443,921 The changes in Level 3 assets measured at fair value on a recurring basis are summarized in the following tables. Swap contract asset gains and losses (realized/unrealized) included in earnings are classified in “realized and unrealized gain (loss) on investments – net unrealized gain/(loss) on swap contracts” on the statements of operations. Investment in unconsolidated trading company asset gains and losses (realized/unrealized) included in earnings are classified in “Change in fair value of investments in unconsolidated trading companies.” During the three months ended June 30, 2019, all identified Level 3 assets were components of the Frontier Diversified Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Six Months ending June 30, 2019 Swaps Frontier Balanced Frontier Long/Short Commodity Balance of recurring Level 3 assets as of January 1, 2019 $ 10,794,908 $ 479,102 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized (103,896 ) (43,201 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of June 30, 2019 $ 10,691,012 $ 435,901 Frontier Diversified Frontier Heritage Balance of recurring Level 3 assets as of January 1, 2019 $ 5,920,414 $ 2,955,444 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized (39,055 ) 81,229 Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of June 30, 2019 $ 5,881,359 $ 3,036,673 For the Six Months ending June 30, 2019 Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 511,718 Change in fair value of investments in unconsolidated trading companies 39,383 Purchases of investments of unconsolidated trading companies - Change in ownership allocation - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of June 30, 2019 $ 551,101 For the Year Ended December 31, 2018 Swaps Frontier Balanced Fund Frontier Long/Short Commodity Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 11,340,959 $ 397,039 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 1,453,948 82,063 Proceeds from collateral reduction (1,999,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 10,794,908 $ 479,102 Frontier Diversified Fund Frontier Heritage Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 6,376,472 $ 3,094,367 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 643,941 (138,923 ) Proceeds from collateral reduction (1,099,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 5,920,414 $ 2,955,444 For the Year Ended December 31, 2018 Investments in Unconsolidated Trading Companies: Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 579,073 Change in fair value of investments in unconsolidated trading companies (67,355 ) Purchases of investments of unconsolidated trading companies - Change in ownership allocation - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2018 $ 511,718 The Series of the Trust assess the levels of the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Series’ accounting policy regarding the recognition of transfers between levels of the fair value hierarchy. During the six months ended June 30, 2019, the Trust did not transfer any assets between Levels 1, 2 or 3. The amounts reflected in the change in ownership allocation result from changes in ownership in the underlying Trading Companies at the Series level, which have resulted in changes in consolidation or de-consolidation by the Series. The ownership in the Trading Companies is accounted for under the equity method, which approximates fair value. The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at June 30, 2019: Frontier Diversified Frontier Long/Short Commodity Frontier Balanced Frontier Heritage Fund Fund Fund Fund Swap Contracts $ (39,055 ) $ (43,201 ) $ (103,896 ) $ 81,229 Frontier Select Fund Investments in Unconsolidated Trading Companies $ 37,710 The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2018: Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 643,941 $ 82,063 $ 1,453,948 $ (138,923 ) Frontier Select Fund Investments in Unconsolidated Trading Companies $ (67,355 )
Frontier Funds [Member]
Fair Value Measurements	3. Fair Value Measurements In connection with the valuation of investments the Trust applies Fair Value Measurement (“ASC 820”). ASC 820 provides clarification that when a quoted price in an active market for the identical asset or liability is not available, a reporting entity is required to measure fair value using certain techniques. ASC 820 also clarifies that when estimating the fair value of an asset or liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the existence of a restriction that prevents the transfer of an asset or liability. ASC 820 also clarifies that both a quoted price in an active market for the identical asset or liability at the measurement date and the quoted price for the identical asset or liability when traded as an asset in an active market when no adjustments to the quoted price of the asset are required are Level 1 fair value measurements. Level 1 Inputs Unadjusted quoted prices in active markets for identical financial assets that the reporting entity has the ability to access at the measurement date. Level 2 Inputs Inputs other than quoted prices included in Level 1 that are observable for the financial assets or liabilities, either directly or indirectly. These might include quoted prices for similar financial assets in active markets, quoted prices for identical or similar financial assets in markets that are not active, inputs other than quoted prices that are observable for the financial assets or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs Unobservable inputs for determining the fair value of financial assets that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the financial asset. The Trust, with respect to the Series, uses the following methodologies to value instruments within its financial asset portfolio at fair value: Trading Securities. Swap Contracts. Investments in Private Investment Companies The following table summarizes the instruments that comprise the Trust’s financial asset portfolio, by Series in aggregate, measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. June 30, 2019 Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Open Trade Equity (Deficit) $ 103,838 $ (61,691 ) $ - $ 42,147 Swap Contracts - - 20,044,944 20,044,944 U.S. Treasury Securities 1,619,710 - - 1,619,710 December 31, 2018 Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Open Trade Equity (Deficit) $ (400,796 ) $ 2,607 $ - $ (398,189 ) Swap Contracts - - 20,149,868 20,149,868 U.S. Treasury Securities 5,684,327 - - 5,684,327 The changes in Level 3 assets measured at fair value on a recurring basis are summarized in the following tables. Swap contract asset gains and losses (realized/unrealized) included in earnings are classified in “realized and unrealized gain (loss) on investments – net unrealized gain/(loss) on swap contracts” on the Consolidated Statement of Operations. For the Balance of recurring Level 3 assets as of January 1, 2018 20,149,868 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized (104,923 ) Proceeds from collateral reduction Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of June 30, 2019 20,044,945 For the Balance of recurring Level 3 assets as of January 1, 2018 21,208,838 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized 2,041,028 Proceeds from collateral reduction (3,099,998 ) Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2018 20,149,868 The Trust assesses the levels of the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Trust’s accounting policy regarding the recognition of transfers between levels of the fair value hierarchy. During the six months ended June 30, 2019, the Trust did not transfer any assets between Levels 1, 2 and 3. The total change in unrealized appreciation (depreciation) included in the consolidated statements of operations attributable to level 3 investments still held at June 30, 2019: Swaps $ (104,924 ) The total change in unrealized appreciation (depreciation) included in the consolidated statements of operations attributable to level 3 investments still held at December 31, 2018: Swaps $ 2,041,028

Swaps Contracts

Swaps Contracts	6 Months Ended
Swaps Contracts	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Swaps Contracts	4. Swap Contracts In addition to authorizing Trading Advisors to manage pre-determined investment levels of futures, option on futures and forward contracts, certain Series of the Trust will strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Total return swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical total return swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount or value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. Each Series’ investment in swaps will likely differ substantially over time due to cash flows, portfolio management decisions and market movements. The swaps serve to diversify the investment holdings of each Series and to provide access to programs and advisors that would not be otherwise available to the Series, and are not used for hedging purposes. The Managing Owner follows a procedure in selecting well-established financial institutions which the Managing Owner, in its sole discretion, considers to be reputable, reliable, financially responsible and well established to act as swap counterparties. The procedure includes due diligence review of documentation on all new and existing financial institution counterparties prior to initiation of the relationship, and quarterly ongoing review during the relationship, to ensure that counterparties meet the Managing Owner’s minimum credit requirements, the counterparty average rating being no less than an investment grade rating as defined by the rating agencies. As of June 30, 2019, and December 31, 2018, approximately 1.8% and 1.6%, respectively, of the Trust’s assets were deposited with over-the-counter counterparties in order to initiate and maintain swaps and is recorded as collateral within the swap fair value within the statement of financial condition. The cash held with the counterparty is not restricted. The Series may strategically invest assets in one or more swaps linked to certain underlying investments or indices at the direction of the Managing Owner. The Trading Company in which the assets of these Series will be invested will not own any of the investments or indices referenced by any swap entered into by these Series. In addition, neither the swap counterparty to the Trading Company of these Series nor any advisor referenced by any such swap is a Trading Advisor to these Series. To help to reduce counterparty risk on the Series, the Managing Owner has the right to reduce the Series’ exposure and remove cash from the Series’ total return swaps with Deutsche Bank AG. This cash holding shall be in excess of $250,000 and may not exceed 40% of the Index exposure in total. Index exposure is defined as the total notional amount plus any profit. The Series are charged interest on this cash holding and any amount removed will be offset against the final settlement value of the swap. As of June 30, 2019, the Frontier Balanced Fund, the Frontier Diversified Fund, the Frontier Long/Short Commodity Fund and Frontier Heritage Fund, had $6,176,555, $4,000,000, $115,000, and $1,900,000, respectively, in cash holdings as shown in the Series’ Statements of Financial Conditions under advance on unrealized swap appreciation, which relates to the Trading Companies’ total return swaps with Deutsche Bank AG. The Series have invested in the following swaps as of and for the six months ended June 30, 2019: Frontier Balanced Fund Frontier Diversified Fund Frontier Frontier Total Return Total Return Total Return Total Return Counterparty Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Deutsche Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 10,605,012 $ 5,747,765 $ 431,716 $ 1,929,799 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ (103,896 ) $ (39,056 ) $ (43,201 ) $ 81,229 Fair Value as of June 30, 2019 $ 10,691,012 $ 5,833,765 $ 461,666 $ 2,905,249 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Series have invested in the following swaps as of and for the year ended December 31, 2018: Frontier Frontier Frontier Frontier Total Return Total Return Total Return Total Return Counterparty Deutsche Deutsche Deutsche Deutsche Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )
Frontier Funds [Member]
Swaps Contracts	4. Swaps Contracts In addition to authorizing Trading Advisors to manage pre-determined investment levels of futures and forward contracts, certain Series of the Trust will strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Total return swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical total return swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount or value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. The Trust’s investment in swaps will likely differ substantially over time due to cash flows, portfolio management decisions and market movements. The swaps serve to diversify the investment holdings of the Trust and to provide access to programs and advisors that would not be otherwise available to the Trust and are not used for hedging purposes. The Managing Owner follows a procedure in selecting well-established financial institutions which the Managing Owner, in its sole discretion, considers to be reputable, reliable, financially responsible and well established to act as swap counterparties. The procedure includes due diligence review of documentation on all new and existing financial institution counterparties prior to initiation of the relationship, and quarterly ongoing review during the relationship, to ensure that counterparties meet the Managing Owner’s minimum credit requirements, the counterparty average rating being no less than an investment grade rating as defined by the rating agencies. As of June 30, 2019 and December 31, 2018, approximately 2.06% or $1,177,400 and 1.46% or $1,180,900 respectively, of the Trust’s assets were deposited with over-the-counter counterparties in order to initiate and maintain swaps and is recorded as Swap Contracts, at fair value on the Consolidated Statements of Financial Condition of the Trust. This cash held with the counterparty is not restricted. The Trust strategically invests assets in one or more swaps linked to certain underlying investments or indices at the direction of the Managing Owner. The Trading Company in which the assets of the Trust will be invested will not own any of the investments or indices referenced by any swap entered into by the Trust. In addition, neither the swap counterparty nor any advisor referenced by any such swap is a Trading Advisor to the Trust. The Trust had invested in the following swap contracts as of and for the six months ended June 30, 2019: XXXIV Balanced XXXV Diversified XXXVII L/S Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 10,605,012 $ 5,747,765 $ 431,716 $ 1,929,799 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ (103,896 ) $ (39,056 ) $ (43,201 ) $ 81,229 Fair Value as of June 30, 2019 $ 10,691,012 $ 5,833,765 $ 461,666 $ 2,905,249 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Trust had invested in the following swap contracts as of and for the year ended December 31, 2018: XXXIV Balanced XXXV Diversified XXXVII L/S Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )

Investments in Unconsolidated T

Investments in Unconsolidated Trading Companies and Private Investment Companies	6 Months Ended
	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Investments in Private Investment Companies/Investments in Unconsolidated Trading Companies and Private Investment Companies	5. Investments in Unconsolidated Trading Companies and Private Investment Companies Investments in unconsolidated Trading Companies and private investment companies represent cash and open trade equity invested in the Trading and private investment companies as well as by each Series and cumulative trading profits or losses allocated to each Series by the Trading Companies and private investment companies. Trading Companies and private investment companies allocate trading profits or losses on the basis of the proportion of each Series’ capital allocated for trading to each respective Trading Company, which bears no relationship to the amount of cash invested by a Series in the Trading Company and private investment companies. The Trading Companies are valued using the equity method of accounting, which approximates fair value. Investments in private investment companies are valued using the NAV provided by the underlying private investment. The Galaxy Plus structure is made up of feeder funds in which the Series invests and master trading entities into which the feeder funds invest. No investment held by a Galaxy Plus master trading entity is greater than 5% of any Series’ total capital. The following table summarizes each of the Series’ investments in unconsolidated Trading Companies as of June 30, 2019 and December 31, 2018: As of June 30, 2019 As of December 31, 2018 Series Percentage of Fair Value Percentage of Fair Value Frontier Diversified Series — Frontier Trading Companies II and XXXVIII 0.14 % $ 18,043 7.19 % $ 1,160,910 Frontier Masters Fund — Frontier Trading Companies II and XXXVIII 1.03 % $ 36,495 13.91 % $ 775,088 Frontier Long/Short Commodity Fund — Frontier Trading Company XXXVIII 0.60 % $ 12,761 1.15 % $ 28,163 Frontier Balanced Fund — Frontier Trading Companies II and XXXVIII 0.03 % $ 6,230 5.48 % $ 1,744,999 Frontier Select Fund — Frontier Trading Companies XXXVIII and XXXIX 15.96 % $ 587,909 13.56 % $ 523,180 Frontier Global Fund — Frontier Trading Companies II and XXXVIII 0.30 % $ 18,384 52.30 % $ 4,292,075 Frontier Heritage Fund — Frontier Trading Companies II and XXXVIII 0.60 % $ 24,242 16.27 % $ 726,686 The following tables summarize each of the Series’ equity in earnings from unconsolidated Trading Companies and private investment companies for the six and three months ended June 30, 2019 and 2018. Trading Realized Change in Net Income Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ (138,899 ) $ (138,899 ) Frontier Trading Company XXXVIII, LLC - - (732 ) (732 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (22,370 ) 635,922 201,668 815,220 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (17,895 ) 46,071 (78,813 ) (50,637 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (173,562 ) (1,016,391 ) (35,635 ) (1,225,588 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (18,736 ) 1,292,724 (74,396 ) 1,199,592 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 286,677 286,677 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (49,975 ) (936,608 ) 185,088 (801,495 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (25,311 ) 24,230 (121,258 ) (122,339 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,786 ) 45,834 20,454 59,502 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (45,648 ) 986,448 (396,129 ) 544,671 Total $ (360,283 ) $ 1,078,230 $ (151,975 ) $ 565,972 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ (337,431 ) $ (337,431 ) Frontier Trading Company XXXVIII, LLC - - (14,574 ) (14,574 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (153,661 ) 1,206,683 134,763 1,187,785 Total $ (153,661 ) $ 1,206,683 $ (217,242 ) $ 835,780 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 39,383 $ 39,383 Frontier Trading Company XXXVIII, LLC - - (1,672 ) (1,672 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (33,911 ) 222,739 (47,068 ) 141,760 Galaxy Plus Fund - TT Feeder Fund (531) LLC (44,428 ) 259,691 (73,313 ) 141,950 Total $ (78,339 ) $ 482,430 $ (82,670 ) $ 321,421 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ (59,538 ) $ (59,538 ) Frontier Trading Company XXXVIII, LLC - - (4,379 ) (4,379 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (41,734 ) 245,955 67,220 271,441 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (49,687 ) 284,089 (63,499 ) 170,903 Total $ (91,421 ) $ 530,044 $ (60,196 ) $ 378,427 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,029 ) $ (1,029 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (37,828 ) (379,307 ) 229,576 (187,559 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 142,869 142,869 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (24,026 ) 125,486 (44,529 ) 56,931 Total $ (61,854 ) $ (253,821 ) $ 326,887 $ 11,212 Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ (76,616 ) $ (76,616 ) Frontier Trading Company XXXVIII, LLC - - (8,996 ) (8,996 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (19,559 ) 379,795 103,977 464,213 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (14,073 ) 28,047 (48,988 ) (35,014 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (108,956 ) (912,164 ) 268,101 (753,019 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (20,998 ) 811,110 (57,565 ) 732,547 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 144,793 144,793 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (35,222 ) (573,436 ) 114,005 (494,653 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (13,254 ) 10,639 (7,477 ) (10,092 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,948 ) 45,318 20,527 57,897 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (34,002 ) 603,982 (196,808 ) 373,172 Total $ (254,012 ) $ 393,291 $ 254,953 $ 394,232 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (65,952 ) $ (65,952 ) Frontier Trading Company XXXVIII, LLC - - (1,558 ) (1,558 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (31,863 ) 231,766 69,765 269,668 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (81,588 ) (163,846 ) (188,680 ) (434,114 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (17,916 ) 77,286 47,910 107,280 Galaxy Plus Fund - TT Feeder Fund (531) LLC (38,936 ) 214,809 (83,135 ) 92,738 Total $ (170,303 ) $ 360,015 $ (221,650 ) $ (31,938 ) Six Months Ended June 30, 2018 Trading Realized Change in Net Income Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ 67,960 $ 67,960 Frontier Trading Company XXXVIII, LLC - - (11,476 ) (11,476 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (43,897 ) (212,016 ) 6,928 (248,985 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (31,385 ) (158,568 ) 1,111 (188,842 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (228,504 ) 369,476 13,457 154,429 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (36,360 ) (138,701 ) 10,762 (164,299 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (123 ) - (3,585 ) (3,708 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (73,528 ) (905,417 ) 60,858 (918,087 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (62,551 ) (72,693 ) 12,369 (122,875 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (13,928 ) (42,692 ) 3,166 (53,454 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (137,437 ) (1,613,467 ) 86,852 (1,664,052 ) Total $ (627,713 ) $ (2,774,078 ) $ 248,402 $ (3,153,389 ) Frontier Winton Fund — Frontier Trading Company II, LLC $ - $ - $ (186,556 ) $ (186,556 ) Frontier Trading Company XXXVIII, LLC - - (66,205 ) (66,205 ) Total $ - $ - $ (252,761 ) $ (252,761 ) Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ $ - $ (41,578 ) $ (41,578 ) Frontier Trading Company XXXVIII, LLC - - 4,561 4,561 Galaxy Plus Fund - TT Feeder Fund (531) LLC (61,704 ) (525,255 ) 67,762 (519,197 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (80,091 ) (94,447 ) (208,032 ) (382,570 ) Total $ (141,795 ) $ (619,702 ) $ 30,745 $ 556,214 Frontier Heritage Fund — Frontier Trading Company II, LLC $ $ - $ 6,663 $ 6,663 Frontier Trading Company XXXVIII, LLC - - (4,695 ) (4,695 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (95,378 ) (550,409 ) 44,752 (601,035 ) Total $ (95,378 ) $ (550,409 ) $ 46,720 $ (599,067 ) Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,812 ) $ (1,812 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (55,540 ) (106,500 ) (43,080 ) 7,880 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (681 ) - (55,507 ) (56,188 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (44,616 ) (236,487 ) 13,305 (267,798 ) Total $ (56,221 ) $ (129,987 ) $ (87,094 ) $ (317,918 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ 6,222 $ 6,222 Frontier Trading Company XXXVIII, LLC - - (1,820 ) (1,820 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (21,609 ) (70,821 ) 2,309 (90,121 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (19,728 ) (71,041 ) 1,112 (89,657 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (88,315 ) 190,256 (45,473 ) 56,468 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (19,585 ) (13,078 ) 8,453 (24,210 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (62 ) 3,942 3,880 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (41,686 ) (336,175 ) 1,742 (376,119 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (37,240 ) (25,944 ) 5,361 (57,823 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (15,597 ) (42,800 ) 3,166 (55,231 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (72,444 ) (772,916 ) 23,417 (821,943 ) Total $ (316,204 ) $ (1,142,581 ) $ 8,431 $ (1,450,354 ) Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (94,552 ) $ (94,552 ) Frontier Trading Company XV, LLC - - - - Frontier Trading Company XXXVIII, LLC - - 17,218 17,218 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - (76,396 ) 68,413 ) (7,983 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (149,210 ) 263,055 (103,684 ) 10,161 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (100,181 ) (726,950 ) 13,640 (813,491 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (47,188 ) (87,994 ) (179,255 ) (314,437 ) Total $ (296,579 ) $ (628,285 ) $ (278,220 ) $ (1,203,084 ) Three Months Ended June 30, 2019 Trading Realized Change in Net Income Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ 382 $ 382 Frontier Trading Company XXXVIII, LLC - - (1,743 ) (1,743 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (7,956 ) 500,989 (261,813 ) 231,220 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (7,282 ) 9,117 (12,265 ) (10,430 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (104,751 ) (3,311,760 ) 2,622,781 (793,730 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (9,768 ) 526,833 (184,438 ) 332,627 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 305,427 305,427 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (21,074 ) (328,285 ) 179,439 (169,920 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (105,511 ) (105,511 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (2,518 ) 56,051 (6,885 ) 46,648 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (21,136 ) 1,171,891 (437,703 ) 713,052 Total $ (174,485 ) $ (1,375,164 ) $ 2,097,671 $ 548,022 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ (23,564 ) $ (23,564 ) Frontier Trading Company XXXVIII, LLC - - (178 ) (178 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (99,335 ) 940,770 (341,757 ) 499,678 Total $ (99,335 ) $ 940,770 $ (365,499 ) $ 475,936 Frontier Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 63,719 $ 63,719 Frontier Trading Company XXXVIII, LLC - - (535 ) (535 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (18,439 ) 189,845 (130,938 ) 40,468 Galaxy Plus Fund - TT Feeder Fund (531) LLC (20,114 ) 312,950 (81,412 ) 211,424 Total $ (38,553 ) $ 502,795 $ (149,166 ) $ 315,076 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ (5,368 ) $ (5,368 ) Frontier Trading Company XXXVIII, LLC - - (1,597 ) (1,597 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (24,706 ) 183,352 (87,492 ) 71,154 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (21,610 ) 341,761 (83,040 ) 237,111 Total $ (46,316 ) $ 525,113 $ (177,497 ) $ 301,300 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (469 ) $ (469 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (22,997 ) (636,737 ) 537,573 (122,161 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 172,203 172,203 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (11,740 ) 151,888 (42,868 ) 97,280 Total $ (34,737 ) $ (484,849 ) $ 666,439 $ 146,853 Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ (711 ) $ (711 ) Frontier Trading Company XXXVIII, LLC - - (403 ) (403 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (9,102 ) 292,763 (123,620 ) 160,041 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (6,039 ) 5,628 (8,508 ) (8,919 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (67,124 ) (2,123,330 ) 1,689,124 (501,330 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (11,268 ) 351,448 (127,805 ) 212,375 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 152,338 152,338 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (15,429 ) (184,729 ) 103,314 (96,844 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (700 ) (700 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (2,990 ) 50,835 (9,848 ) 37,997 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (16,278 ) 685,223 (254,362 ) 414,583 Total $ (128,230 ) $ (922,162 ) $ 1,418,819 $ 368,427 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (4,502 ) $ (4,502 ) Frontier Trading Company XXXVIII, LLC - - (1,781 ) (1,781 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (17,715 ) 168,928 (60,575 ) 90,638 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (41,279 ) (1,069,832 ) 878,048 (233,063 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (7,140 ) 82,721 (37,533 ) 38,048 Galaxy Plus Fund - TT Feeder Fund (531) LLC (15,303 ) 283,646 (88,757 ) 179,586 Total $ (81,437 ) $ (534,537 ) $ 684,900 $ 68,926 Three Months Ended June 30, 2018 Trading Realized Change in Net Income Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ 302,930 $ 302,930 Frontier Trading Company XXXVIII, LLC - - (6,881 ) (6,881 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (13,073 ) (158,310 ) 72,621 98,762 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (14,629 ) 131,409 (38,608 ) 78,172 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (141,047 ) (430,258 ) 805,293 233,988 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (14,285 ) 333,049 (63,193 ) 255,571 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (123 ) - (38,889 ) (39,012 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (37,583 ) 292,017 423,980 6 78,414 Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (21,107 ) (149,161 ) 18,142 (152,126 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,130 ) (53,768 ) 25,289 (35,609 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (63,787 ) (25,610 ) (33,194 ) (122,591 ) Total $ (312,764 ) $ (60,632 ) $ 1,467,490 $ 1,094,094 Frontier Winton Fund — Frontier Trading Company II LLC $ - $ - $ 675,380 $ 675,380 Frontier Trading Company XXXVIII, LLC - - (29,123 ) (29,123 ) Total $ - $ - $ 646,257 $ 646,257 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ (41,578 ) $ (41,578 ) Frontier Trading Company XXXVIII, LLC - - (1,017 ) (1,017 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (10,721 ) 23,055 37,712 50,046 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (42,595 ) (12,170 ) (16,423 ) (71,188 ) Total $ (53,316 ) $ 10,885 $ (21,306 ) $ (63,737 ) Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ 129,198 $ 129,198 Frontier Trading Company XXXVIII, LLC - - (3,728 ) (3,728 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (42,603 ) (5,832 ) (12,130 ) (60,565 ) Total $ (42,603 ) $ (5,832 ) $ 113,340 $ 64,905 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,870 ) $ (1,870 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (25,765 ) (63,680 ) (118,815 ) 29,370 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (681 ) - (148,965 ) (149,646 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (19,032 ) (6,922 ) (3,573 ) (29,527 ) Total $ (45,478 ) $ (70,602 ) $ (35,593 ) $ (151,673 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ 156,848 $ 156,848 Frontier Trading Company XXXVIII, LLC - - (2,803 ) (2,803 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (5,137 ) (52,919 ) 24,207 (33,849 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (9,617 ) 72,926 (21,449 ) 41,860 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (41,617 ) (209,611 ) 350,445 99,217 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (9,912 ) (139,185 ) (24,276 ) 104,997 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (62 ) (13,567 ) (13,629 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (20,301 ) 132,708 177,519 (289,926 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (11,738 ) (64,178 ) 8,247 (67,669 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,950 ) (53,876 ) 25,289 (35,537 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (31,712 ) 3,362 (22,990 ) (51,340 ) Total $ (137,984 ) $ (32,465 ) $ 657,470 $ 487,021 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ 148,044 $ (94,552 ) Frontier Trading Company XXXVIII, LLC - - 8,804 - Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (70,572 ) (207,046 ) 370,789 93,171 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (44,250 ) (27,294 ) (16,449 ) (87,993 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (9,581 ) 27,308 35,040 52,767 Total $ (124,403 ) $ (207,032 ) $ 546,228 $ 214,793 The Series’ investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table: Redemptions Redemptions Liquidity Notice Period Permitted Restrictions Frontier Diversified Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Masters Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Long/Short Commodity Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Balanced Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Select Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Heritage Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Frontier Global Fund Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None
Frontier Funds [Member]
Investments in Private Investment Companies/Investments in Unconsolidated Trading Companies and Private Investment Companies	5. Investments in Private Investment Companies Investments in private investment companies represent cash and open trade equity invested in the private investment companies as well as the cumulative trading profits or losses allocated to the Trust by the private investment companies. Private investment companies allocate trading profits or losses on the basis of the proportion of the Trust’s capital allocated for trading to each respective private investment company, which bears no relationship to the amount of cash invested by the Trust in the private investment companies. Investments in private investment companies are valued using the NAV provided by the underlying private investment. The Galaxy Plus structure is made up of feeder funds in which the Trust invests and master trading entities into which the feeder funds invest. No investment held by a Galaxy Plus master trading entity is greater than 5% of the Trust’s total capital. The following table summarizes the Trust’s equity in earnings from each of the private investment companies during the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (158,814 ) 2,086,802 (875,257 ) 1,052,731 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (13,321 ) 14,745 (20,773 ) (19,349 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (236,151 ) (7,141,659 ) 5,727,526 (1,650,284 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (21,036 ) 878,281 (312,243 ) 545,002 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 629,968 629,968 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (36,503 ) (513,014 ) 282,753 (266,764 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (106,211 ) (106,211 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (5,508 ) 106,886 (16,733 ) 84,645 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (48,550 ) (48,550 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (35,417 ) 596,596 (170,169 ) 391,010 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (96,343 ) 2,623,329 (986,444 ) 1,540,542 Total $ (603,093 ) $ (1,348,034 ) $ 4,103,867 $ 2,152,740 Three Months Ended June 30, 2018 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (18,210 ) $ (211,229 ) $ 96,828 $ (132,611 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (24,246 ) 204,335 (60,057 ) 120,032 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (279,001 ) (910,595 ) 1,645,342 455,746 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (24,197 ) 472,234 (87,469 ) 360,568 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (804 ) (62 ) (201,421 ) (202,287 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (57,884 ) 424,725 601,499 968,340 Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (32,845 ) (213,339 ) 26,389 (219,795 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (15,080 ) (107,644 ) 50,578 (72,146 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (49,181 ) (49,181 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (20,302 ) 50,363 72,752 102,813 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (240,251 ) (74,466 ) (104,759 ) (419,476 ) Total $ (712,820 ) $ (365,678 ) $ 1,990,501 $ 912,003 Six Months Ended June 30, 2019 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (269,187 ) 2,700,121 577,393 3,008,327 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (31,968 ) 74,118 (127,801 ) (85,651 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (401,934 ) (2,471,708 ) 273,362 (2,600,280 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (39,734 ) 2,103,831 (131,961 ) 1,932,139 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 574,339 574,339 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (85,197 ) (1,510,044 ) 299,093 (1,296,148 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (38,565 ) 34,869 (128,735 ) (132,431 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (14,734 ) 91,152 40,981 117,399 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (80,033 ) (80,033 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (83,364 ) 474,500 (156,448 ) 234,688 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (205,190 ) 2,300,30 (700,123 ) 1,394,717 Total $ (1,169,873 ) $ 3,796,872 $ 440,067 $ 3,067,066 Six Months Ended June 30, 2018 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (68,124 ) $ (282,837 ) $ 9,237 $ (341,724 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - (76,396 ) 68,413 (7,983 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (51,029 ) (229,609 ) 2,223 (278,415 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (521,358 ) 929,287 (178,780 ) 229,149 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (53,977 ) (151,779 ) 19,215 (186,541 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (804 ) (62 ) (54,811 ) (55,677 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (115,169 ) (944,354 ) 62,600 (996,923 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (99,908 ) (98,637 ) 17,730 (180,815 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (29,450 ) (83,146 ) 6,332 (106,264 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (76,792 ) (76,792 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (95,405 ) (147,216 ) (333,152 ) (575,773 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (543,620 ) (4,460,709 ) 195,593 (4,808,736 Total $ (1,578,844 ) $ (5,545,458 ) $ (262,192 ) $ (7,386,494 ) The Trust’s investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table: Redemptions Notice Period Redemptions Permitted Liquidity Restrictions Frontier Funds Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None

Transactions with Affiliates

Transactions with Affiliates	6 Months Ended
Transactions with Affiliates	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Transactions with Affiliates	6. Transactions with Affiliates The Managing Owner contributes funds to the Trust, with respect to the Series, in order to have a 1% interest (“Minimum Purchase Commitment”) in the aggregate capital, profits and losses of all Series and in return will receive units designated as general units in the Series in which the Managing Owner invests such funds. The general units may only be purchased by the Managing Owner and may be subject to no management fees or management fees at reduced rates. Otherwise, the general units hold the same rights as the limited units. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of the combined Series of the Trust. Such contribution was made by the Managing Owner before trading commenced for the Trust and will be maintained throughout the existence of the Trust, and the Managing Owner will make such purchases as are necessary to effect this requirement. Additionally, the Managing Owner agreed with certain regulatory bodies to maintain a 1% interest specifically in the Frontier Balanced Fund Class 1AP and 2a Units, aggregated, and each of the Frontier Long/Short Commodity Fund, Frontier Diversified Fund and Frontier Masters Fund. The 1% interest in these specific Series is included in computing the Minimum Purchase Commitment in aggregate capital. In addition to the general units the Managing Owner receives in respect of its Minimum Purchase Commitment, the Managing Owner may purchase limited units in any Series as a Limited Owner. Principals of the Managing Owner or affiliates are allowed to own beneficial interests in the Trust, with respect to the Series, as well. All Units purchased by the Managing Owner are held for investment purposes only and not for resale. The Managing Owner may make purchases or redemptions at any time on the same terms as any Limited Owner. The Trust has and will continue to have certain relationships with the Managing Owner and its affiliates. Expenses Management Fees— As of the date of this report, for a Series that has invested in a swap, a Trading Advisor does not receive any management fees directly from the Series for such swap, and instead the relevant Trading Advisor receives compensation via the fees embedded in the swap. As of June 30, 2019 and December 31, 2018, the management fee embedded in (i) swaps owned by Frontier Diversified Fund was 1.00% per annum, (ii) swaps owned by Frontier Balanced Fund was 1.00% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 1.50% per annum, (iv) swaps owned by Frontier Select Fund was 1.00% per annum, and (v) swaps owned by Frontier Heritage Fund was 1.00% per annum, and the Managing Owner has waived the entire management fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded management fee was accrued on the relevant notional amount of the swap. The management fee as a percentage of the applicable Series’ notional assets will be greater than the percentage of the applicable Series’ net asset value to the extent that the notional assets of the Series exceeds its net asset value. The Managing Owner expects that the notional assets of each Series will generally be maintained at a level in excess of the net asset value of such Series and such excess may be substantial to the extent the Managing Owner deems necessary to achieve the desired level of volatility. Trading Fees— Incentive Fees— Service Fees— The Managing Owner has determined that the purchase of additional units of the relevant series will commence in 2019. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $23,105, $31,765, $136, $296,547, $14,233, $145,067 and $53,155 for the Frontier Diversified, Masters, Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively. The following table summarizes fees earned by the Managing Owner for the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 Incentive (Rebate) Fees Management Fee Service Fee Trading Fee Frontier Diversified Fund $ - $ - $ 11,366 $ 126,026 Frontier Masters Fund - 2,072 2,268 58,718 Frontier Long/Short Commodity Fund - - 152 14,365 Frontier Balanced Fund - 5,286 154,061 248,123 Frontier Select Fund - - 26,562 22,475 Frontier Global Fund - 9,531 42,779 82,598 Frontier Heritage Fund - 1,100 20,713 29,653 Three Months Ended June 30, 2018 Incentive Fees (rebate) Management Fees Risk Analysis Fees Service Fees Trading Fees Frontier Diversified Fund $ - $ 13,229 $ - $ 14,689 $ 143,613 Frontier Masters Fund - 28,862 - 12,929 105,998 Frontier Long/Short Commodity Fund - - - 407 21,519 Frontier Balanced Fund - 22,566 1,692 237,810 344,769 Frontier Select Fund - - - 33,273 28,109 Frontier Winton Fund - 131,682 - 80,907 80,703 Frontier Heritage Fund - 33,893 - 31,302 36,855 Six Months Ended June 30, 2019 Incentive (Rebate) Fees Management Fee Service Fee Trading Fee Frontier Diversified Fund $ - $ 2,668 $ 23,395 $ 256,330 Frontier Masters Fund - 7,665 9,754 126,036 Frontier Long/Short Commodity Fund - - 314 28,217 Frontier Balanced Fund - 13,365 324,926 527,460 Frontier Select Fund - - 52,067 45,107 Frontier Global Fund - 38,679 94,902 125,313 Frontier Heritage Fund - 7,289 43,898 56,746 Six Months Ended June 30, 2018 Incentive Fees (rebate) Management Fees Risk Analysis Fees Service Fees Trading Fees Frontier Diversified Fund $ 1,881 $ 24,792 $ - $ 30,804 $ 308,763 Frontier Masters Fund - 61,211 - 27,898 240,046 Frontier Long/Short Commodity Fund - - - 1,064 46,212 Frontier Balanced Fund 145,134 42,902 3,529 500,791 728,945 Frontier Select Fund - - - 72,962 65,703 Frontier Winton Fund - 262,342 - 175,167 163,278 Frontier Heritage Fund 1,394 69,874 - 68,410 79,147 The following table summarizes fees payable to the Managing Owner as of June 30, 2019 and December 31, 2018. Incentive Fees Management Fees Interest Fees Service Fees Trading Fees Risk Analysis Fees Frontier Diversified Fund $ - $ - $ - $ 2,464 $ 36,982 $ - Frontier Masters Fund - - - 201 14,956 - Frontier Long/Short Commodity Fund - - - 4 4,793 - Frontier Balanced Fund - 8,828 - 45,227 76,075 9,994 Frontier Select Fund - - 335 8,212 7,120 - Frontier Global Fund - - 660 12,926 23,122 - Frontier Heritage Fund - - 635 6,240 10,467 - As of December 31, 2018 Incentive Fees Management Interest Fees Service Fees Trading Fees Frontier Diversified Fund $ 10,897 $ 3,875 $ - $ 4,498 $ 44,827 Frontier Masters Fund - 8,347 - 1,750 27,984 Frontier Long/Short Commodity Fund - - - 51 5,306 Frontier Balanced Fund - 13,917 1,490 56,791 101,770 Frontier Select Fund - - - 8,575 7,812 Frontier Global Fund - 42,705 8,124 17,803 24,353 Frontier Heritage Fund - 9,201 1,238 6,684 10,189 With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed therefore by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk and the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. During the periods covered by this report there were no amounts receivable from the Managing Owner for any differences resulting from service fees. Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) of average net assets less any fair market value related to swaps is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a, and Class 3a only), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a) 100% of the interest is retained by the respective Series. The following table outlines the interest paid by each Series to the Managing Owner and its ratio to average net assets for the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 Gross Amount Paid to the Gross Amount Paid to the Ratio to Average Ratio to Average Managing Owner Managing Owner Net Assets Net Assets Frontier Diversified Fund Class 1 $ - $ - 0.00 % 0.00 % Frontier Diversified Fund Class 2 - - 0.00 % 0.00 % Frontier Diversified Fund Class 3 - - 0.00 % 0.00 % Frontier Masters Fund Class 1 - - 0.00 % 0.00 % Frontier Masters Fund Class 2 - - 0.00 % 0.00 % Frontier Masters Fund Class 3 - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2 3 37 0.00 % 0.02 % Frontier Long/Short Commodity Fund Class 3 81 488 0.00 % 0.02 % Frontier Long/Short Commodity Fund Class 1a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 3a - - 0.00 % 0.00 % Frontier Balanced Fund Class 1 1,150 14,652 0.01 % 0.05 % Frontier Balanced Fund Class 1AP 19 256 0.01 % 0.05 % Frontier Balanced Fund Class 2 232 2,656 0.01 % 0.05 % Frontier Balanced Fund Class 2a 3 39 0.00 % 0.01 % Frontier Balanced Fund Class 3a 10 108 0.00 % 0.01 % Frontier Select Fund Class 1 1,400 3,375 0.04 % 0.08 % Frontier Select Fund Class 1AP 3 15 0.05 % 0.08 % Frontier Select Fund Class 2 41 359 0.04 % 0.08 % Frontier Global Fund Class 1 3,631 34,013 0.06 % 0.32 % Frontier Global Fund Class 1AP 21 111 0.06 % 0.32 % Frontier Global Fund Class 2 252 3,251 0.06 % 0.32 % Frontier Heritage Fund Class 1 1,196 5,382 0.04 % 0.13 % Frontier Heritage Fund Class 1AP 2 5 0.05 % 0.12 % Frontier Heritage Fund Class 2 255 836 0.04 % 0.13 % Total $ 8,299 $ 65,583 Six Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 Gross Amount Paid to the Gross Amount Paid to the Ratio to Average Ratio to Average Managing Owner Managing Owner Net Assets Net Assets Frontier Diversified Fund Class 1 $ - $ - 0.00 % 0.00 % Frontier Diversified Fund Class 2 - - 0.00 % 0.00 % Frontier Diversified Fund Class 3 - - 0.00 % 0.00 % Frontier Masters Fund Class 1 - - 0.00 % 0.00 % Frontier Masters Fund Class 2 - - 0.00 % 0.00 % Frontier Masters Fund Class 3 - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2 9 37 0.01 % 0.02 % Frontier Long/Short Commodity Fund Class 3 208 488 0.01 % 0.02 % Frontier Long/Short Commodity Fund Class 1a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 3a - - 0.00 % 0.00 % Frontier Balanced Fund Class 1 2,881 14,652 0.01 % 0.04 % Frontier Balanced Fund Class 1AP 45 256 0.01 % 0.05 % Frontier Balanced Fund Class 2 555 2,656 0.01 % 0.04 % Frontier Balanced Fund Class 2a 7 39 0.00 % 0.01 % Frontier Balanced Fund Class 3a 23 108 0.00 % 0.01 % Frontier Select Fund Class 1 2,259 5,835 0.06 % 0.12 % Frontier Select Fund Class 1AP 3 25 0.08 % 0.12 % Frontier Select Fund Class 2 71 724 0.06 % 0.11 % Frontier Global Fund Class 1 22,360 62,703 0.35 % 0.53 % Frontier Global Fund Class 1AP 105 194 0.32 % 0.54 % Frontier Global Fund Class 2 1,286 7,028 0.32 % 0.52 % Frontier Heritage Fund Class 1 3,424 5,382 0.12 % 0.12 % Frontier Heritage Fund Class 1AP 3 5 0.12 % 0.10 % Frontier Heritage Fund Class 2 669 836 0.11 % 0.12 % Total $ 33,908 $ 100,968
Frontier Funds [Member]
Transactions with Affiliates	6. Transactions with Affiliates The Managing Owner contributes funds to the Trust in order to have a 1% interest in the aggregate capital, profits and losses and in return will receive units designated as general units in the Series of the Trust in which the Managing Owner invests such funds. The general units may only be purchased by the Managing Owner and may be subject to no advisory fees or management advisory fees at reduced rates. Otherwise, the general units hold the same rights as the limited units. The Managing Owner is required to maintain at least a 1% interest (“Minimum Purchase Commitment”) in the aggregate capital, profits and losses of the Trust so long as it is acting as the Managing Owner of the Trust. Such contribution was made by the Managing Owner before trading commenced for the Trust and will be maintained throughout the existence of the Trust, and the Managing Owner will make such purchases as are necessary to effect this requirement. Additionally, the Managing Owner agreed with certain regulatory bodies to maintain a 1% interest specifically in the Frontier Balanced Fund Class 1AP Units and Frontier Balanced Fund Class 2a Units, aggregated, and each of the Frontier Long/Short Commodity Fund, Frontier Diversified Fund, and Frontier Masters Fund. The 1% interest in these specific Series of the Trust is included in computing the Minimum Purchase Commitment in aggregate capital. In addition to the general units the Managing Owner receives in respect of its Minimum Purchase Commitment, the Managing Owner may purchase limited units in any Series as a Limited Owner. Principals of the Managing Owner or affiliates are allowed to own beneficial interests in the Trust, as well. All units purchased by the Managing Owner are held for investment purposes only and not for resale. The Managing Owner may make purchases or redemptions at any time on the same terms as any Limited Owner. The Trust has and will continue to have certain relationships with the Managing Owner and its affiliates. Expenses Management Fees— The management fee as a percentage of the applicable Series’ notional assets will be greater than the percentage of the applicable Series’ net asset value to the extent that the notional assets of the Series exceeds its net asset value. The Managing Owner expects that the notional assets of each Series will generally be maintained at a level in excess of the net asset value of such Series and such excess may be substantial to the extent the Managing Owner deems necessary to achieve the desired level of volatility. Trading Fees— Incentive Fees— . Service Fees— As of June 30, 2019, the Trust had a payable to the Managing Owner in the amounts of $0, $8,828, $1,630, $173,515, $9,994 and $75,274 for incentive fees, management fees, interest, service fees, risk analysis fees, and trading fees, respectively. As of December 31, 2018, the Trust had a payable to the Managing Owner in the amounts of $10,897, $78,045, $10,852, $222,241, and $96,152 for incentive fees, management fees, interest, trading fees, and service fees, respectively. For the three months ended June 30, 2019 the Trust paid the Managing Owner $0, $17,989, $(3,820), $257,901 and $581,958 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. For the six months ended June 30, 2019 the Trust paid the Managing Owner $0, $69,666, $2,872, $549,256 and $1,165,209 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. For the three months ended June 30, 2018 the Trust paid the Managing Owner $0, $230,232, $411,318 and $761,690 for incentive fees, management fees, service fees, and trading fees, respectively. For the six months ended June 30, 2018 the Trust paid the Managing Owner $148,409, $461,121, $877,096 and $1,632,215 for incentive fees, management fees, service fees, and trading fees, respectively. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed therefore by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. For the three months ended June 30, 2019 and 2018, amounts received or receivable from the Managing Owner for the difference in monthly service fees from the prepaid initial service fees were $0 and $0, respectively. Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a, Class 3a only), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a, Class 3a only) 100% of the interest is retained by the respective Series. During the three months ended June 30, 2019 and 2018, the Trust paid $8,299 and $55,400, respectively, of such interest income to the Managing Owner. Such amounts are not included in the Consolidated Statement of Operations of the Trust. All other interest income is recorded by the Trust on the Consolidated Statement of Operations.

Financial Highlights

Financial Highlights	6 Months Ended
Financial Highlights	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Financial Highlights	7. Financial Highlights The following information presents the financial highlights of the Trust, with respect to the Series, for the three and six months ended June 30, 2019 and 2018. Three months ending June 30, 2019 Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, March 31, 2019 $ 100.84 $ 119.69 $ 111.62 $ 88.19 $ 104.69 $ 98.04 $ 50.14 $ 93.67 $ 58.96 $ 98.25 $ 61.96 Net operating results: Interest income 0.01 0.01 0.01 0.03 0.04 0.04 0.01 0.02 0.01 0.02 0.01 Expenses (1.69 ) (1.12 ) (1.05 ) (2.10 ) (1.68 ) (1.57 ) (0.82 ) (0.66 ) (0.41 ) (0.69 ) (0.44 ) Net gain/(loss) on investments, net of non-controlling interests 3.29 3.53 3.38 1.20 1.05 1.02 3.53 5.49 3.68 5.76 3.92 Net income/(loss) 1.60 2.42 2.34 (0.86 ) (0.59 ) (0.51 ) 2.72 4.85 3.28 5.09 3.49 Net asset value, June 30, 2019 $ 102.44 $ 122.11 $ 113.96 $ 87.33 $ 104.10 $ 97.53 $ 52.86 $ 98.52 $ 62.24 $ 103.34 $ 65.45 Ratios to average net assets Net investment income/(loss) -6.74 % -3.73 % -3.73 % -9.40 % -6.32 % -6.32 % -6.30 % -2.66 % -2.66 % -2.66 % -2.66 % Expenses before incentive fees (3)(4) 6.77 % 3.76 % 3.76 % 9.55 % 6.48 % 6.48 % 6.38 % 2.74 % 2.74 % 2.74 % 2.74 % Expenses after incentive fees (3)(4) 6.77 % 3.76 % 3.76 % 9.55 % 6.48 % 6.48 % 6.38 % 2.74 % 2.74 % 2.74 % 2.74 % Total return before incentive fees (2) 1.59 % 2.02 % 2.10 % -0.98 % -0.56 % -0.52 % 5.42 % 5.18 % 5.56 % 5.18 % 5.63 % Total return after incentive fees (2) 1.59 % 2.02 % 2.10 % -0.98 % -0.56 % -0.52 % 5.42 % 5.18 % 5.56 % 5.18 % 5.63 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2019 $ 114.89 $ 132.01 $ 178.04 $ 154.27 $ 153.78 $ 70.76 $ 82.30 $ 107.99 Net operating results: Interest income 0.06 0.07 0.09 0.08 0.08 0.00 0.00 0.00 Expenses (2.00 ) (1.30 ) (1.76 ) (1.52 ) (1.52 ) (1.00 ) (0.52 ) (0.69 ) Net gain/(loss) on investments, net of non-controlling interests 3.41 3.91 5.28 4.66 4.57 6.27 6.56 9.66 Net income/(loss) 1.47 2.68 3.62 3.22 3.13 5.27 6.04 8.97 Net asset value, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Ratios to average net assets Net investment income/(loss) -6.76 % -3.72 % -3.72 % -3.72 % -3.72 % -5.52 % -2.49 % -2.49 % Expenses before incentive fees (3)(4) 6.97 % 3.93 % 3.93 % 3.93 % 3.93 % 5.52 % 2.49 % 2.49 % Expenses after incentive fees (3)(4) 6.97 % 3.93 % 3.93 % 3.93 % 3.93 % 5.52 % 2.49 % 2.49 % Total return before incentive fees (2) 1.28 % 2.03 % 2.03 % 2.09 % 2.04 % 7.45 % 7.34 % 8.31 % Total return after incentive fees (2) 1.28 % 2.03 % 2.03 % 2.09 % 2.04 % 7.45 % 7.34 % 8.31 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2019 $ 136.33 $ 156.50 $ 195.48 $ 99.68 $ 112.44 $ 153.46 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (3.15 ) (2.42 ) (3.02 ) (1.71 ) (1.12 ) (1.46 ) Net gain/(loss) on investments, net of non-controlling interests 10.46 12.05 15.02 11.63 15.02 17.96 Net income/(loss) 7.31 9.63 12.00 9.92 13.90 16.50 Net asset value, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Ratios to average net assets Net investment income/(loss) -9.11 % -6.07 % -6.07 % -6.75 % -3.71 % -3.71 % Expenses before incentive fees (3)(4) 9.11 % 6.07 % 6.07 % 6.75 % 3.71 % 3.71 % Expenses after incentive fees (3)(4) 9.11 % 6.07 % 6.07 % 6.75 % 3.71 % 3.71 % Total return before incentive fees (2) 5.36 % 6.15 % 6.14 % 9.95 % 12.36 % 10.75 % Total return after incentive fees (2) 5.36 % 6.15 % 6.14 % 9.95 % 12.36 % 10.75 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, March 31, 2018 $ 106.53 $ 124.26 $ 115.59 $ 98.30 $ 114.67 $ 107.10 $ 77.86 $ 112.44 $ 89.95 $ 117.97 $ 94.24 Net operating results: Interest income 0.06 0.07 0.07 0.10 0.12 0.11 0.07 0.11 0.08 0.11 0.09 Expenses (1.73 ) (1.07 ) (0.99 ) (2.19 ) (1.94 ) (1.81 ) (1.23 ) (0.67 ) (0.53 ) (0.70 ) (0.56 ) Net gain/(loss) on investments, net of non-controlling interests 3.44 3.61 3.43 3.12 3.53 3.37 (5.92 ) (5.36 ) (7.37 ) (5.63 ) (7.66 ) Net income/(loss) 1.77 2.61 2.50 1.03 1.71 1.67 (7.08 ) (5.92 ) (7.82 ) (6.22 ) (8.13 ) Net asset value, June 30, 2018 $ 108.30 $ 126.87 $ 118.09 $ 99.33 $ 116.38 $ 108.77 $ 70.78 $ 106.52 $ 82.13 $ 111.75 $ 86.11 Ratios to average net assets Net investment income/(loss) -6.27 % -3.20 % -3.20 % -8.68 % -6.48 % -6.48 % -6.13 % -2.05 % -2.05 % -2.05 % -2.05 % Expenses before incentive fees (3)(4) 6.50 % 3.43 % 3.43 % 9.11 % 6.91 % 6.91 % 6.51 % 2.43 % 2.43 % 2.43 % 2.43 % Expenses after incentive fees (3)(4) 6.50 % 3.43 % 3.43 % 9.11 % 6.91 % 6.91 % 6.51 % 2.43 % 2.43 % 2.43 % 2.43 % Total return before incentive fees (2) 1.66 % 2.10 % 2.16 % 1.05 % 1.49 % 1.56 % -9.09 % -5.27 % -8.69 % -5.27 % -8.63 % Total return after incentive fees (2) 1.66 % 2.10 % 2.16 % 1.05 % 1.49 % 1.56 % -9.09 % -5.27 % -8.69 % -5.27 % -8.63 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2018 $ 124.93 $ 139.33 $ 187.88 $ 162.67 $ 162.12 $ 76.47 $ 85.36 $ 113.28 Net operating results: Interest income 0.03 0.03 0.04 0.03 0.03 0.00 0.00 0.00 Expenses (2.08 ) (1.29 ) (1.74 ) (1.51 ) (1.50 ) (0.98 ) (0.48 ) (0.63 ) Net gain/(loss) on investments, net of non-controlling interests 2.33 2.61 3.54 3.14 3.12 (0.74 ) (0.81 ) (1.09 ) Net income/(loss) 0.28 1.35 1.84 1.66 1.65 (1.72 ) (1.29 ) (1.72 ) Net asset value, June 30, 2018 $ 125.21 $ 140.68 $ 189.72 $ 164.33 $ 163.77 $ 74.75 $ 84.07 $ 111.56 Ratios to average net assets Net investment income/(loss) -6.64 % -3.64 % -3.64 % -3.64 % -3.64 % -5.28 % -2.28 % -2.28 % Expenses before incentive fees (3)(4) 6.73 % 3.73 % 3.73 % 3.73 % 3.73 % 5.28 % 2.28 % 2.28 % Expenses after incentive fees (3)(4) 6.73 % 3.73 % 3.73 % 3.73 % 3.73 % 5.28 % 2.28 % 2.28 % Total return before incentive fees (2) 0.22 % 0.97 % 0.98 % 1.02 % 1.02 % -2.25 % -1.51 % -1.52 % Total return after incentive fees (2) 0.22 % 0.97 % 0.98 % 1.02 % 1.02 % -2.25 % -1.51 % -1.52 % Frontier Winton Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2018 $ 144.60 $ 161.61 $ 196.85 $ 104.50 $ 116.64 $ 156.11 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (3.72 ) (2.95 ) (3.59 ) (2.27 ) (1.68 ) (2.25 ) Net gain/(loss) on investments, net of non-controlling interests 7.78 8.53 10.21 0.45 0.50 0.68 Net income/(loss) 4.06 5.58 6.62 (1.82 ) (1.18 ) (1.57 ) Net asset value, June 30, 2018 $ 148.66 $ 167.19 $ 203.47 $ 102.68 $ 115.46 $ 154.54 Ratios to average net assets Net investment income/(loss) -10.21 % -7.20 % -7.20 % -8.87 % -5.87 % -5.87 % Expenses before incentive fees (3)(4) -10.21 % 7.20 % 7.20 % 8.87 % 5.87 % 5.87 % Expenses after incentive fees (3)(4) -10.21 % 7.20 % 7.20 % 8.87 % 5.87 % 5.87 % Total return before incentive fees (2) 2.81 % 3.45 % 3.36 % -1.74 % -1.01 % -1.01 % Total return after incentive fees (2) 2.81 % 3.45 % 3.36 % -1.74 % -1.01 % -1.01 % Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2018 $ 102.25 $ 120.84 $ 112.62 $ 91.10 $ 107.68 $ 100.77 $ 56.80 $ 98.82 $ 66.52 $ 103.66 $ 69.83 Net operating results: Interest income 0.04 0.05 0.05 0.04 0.05 0.05 0.03 0.05 0.03 0.05 0.03 Expenses (3.32 ) (2.16 ) (2.02 ) (3.59 ) (3.12 ) (2.92 ) (1.59 ) (1.25 ) (0.78 ) (1.31 ) (0.83 ) Net gain/(loss) on investments, net of non-controlling interests 3.47 3.38 3.31 (0.22 ) (0.51 ) (0.37 ) (2.38 ) 0.90 (3.53 ) 0.94 (3.59 ) Net income/(loss) 0.19 1.27 1.34 (3.77 ) (3.58 ) (3.24 ) (3.94 ) (0.30 ) (4.28 ) (0.32 ) (4.38 ) Net asset value, June 30, 2019 $ 102.44 $ 122.11 $ 113.96 $ 87.33 $ 104.10 $ 97.53 $ 52.86 $ 98.52 $ 62.24 $ 103.34 $ 65.45 Ratios to average net assets Net investment income/(loss) -13.31 % -7.23 % -7.23 % -16.90 % -12.15 % -12.15 % -12.58 % -5.12 % -5.12 % -5.12 % -5.12 % Expenses before incentive fees (3)(4) 13.49 % 7.40 % 7.40 % 17.10 % 12.35 % 12.35 % 12.80 % 5.34 % 5.34 % 5.34 % 5.34 % Expenses after incentive fees (3)(4) 13.49 % 7.40 % 7.40 % 17.10 % 12.35 % 12.35 % 12.80 % 5.34 % 5.34 % 5.34 % 5.34 % Total return before incentive fees (2) 0.19 % 1.05 % 1.19 % -4.14 % -3.32 % -3.22 % -6.94 % -0.30 % -6.43 % -0.31 % -6.27 % Total return after incentive fees (2) 0.19 % 1.05 % 1.19 % -4.14 % -3.32 % -3.22 % -6.94 % -0.30 % -6.43 % -0.31 % -6.27 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Net operating results: Interest income 0.10 0.12 0.16 0.14 0.14 0.00 0.00 0.00 Expenses (3.96 ) (2.60 ) (3.50 ) (3.04 ) (3.03 ) (1.92 ) (1.04 ) (1.33 ) Net gain/(loss) on investments, net of non-controlling interests 2.59 3.01 4.06 3.58 3.54 6.54 6.90 10.11 Net income/(loss) (1.27 ) 0.53 0.72 0.68 0.65 4.62 5.86 8.78 Net asset value, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Ratios to average net assets Net investment income/(loss) -13.67 % -7.63 % -7.63 % -7.63 % -7.63 % -11.10 % -5.06 % -5.06 % Expenses before incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Expenses after incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Total return before incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Total return after incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (5.21 ) (3.73 ) (4.65 ) (3.24 ) (2.16 ) (2.75 ) Net gain/(loss) on investments, net of non-controlling interests 17.28 19.94 24.96 13.01 16.72 20.18 Net income/(loss) 12.07 16.21 20.31 9.77 14.56 17.43 Net asset value, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Ratios to average net assets Net investment income/(loss) -15.82 % -9.78 % -9.78 % -13.39 % -7.34 % -7.34 % Expenses before incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Expenses after incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Total return before incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % Total return after incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Net operating results: Interest income 0.10 0.12 0.16 0.14 0.14 0.00 0.00 0.00 Expenses (3.96 ) (2.60 ) (3.50 ) (3.04 ) (3.03 ) (1.92 ) (1.04 ) (1.33 ) Net gain/(loss) on investments, net of non-controlling interests 2.59 3.01 4.06 3.58 3.54 6.54 6.90 10.11 Net income/(loss) (1.27 ) 0.53 0.72 0.68 0.65 4.62 5.86 8.78 Net asset value, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Ratios to average net assets Net investment income/(loss) -13.67 % -7.63 % -7.63 % -7.63 % -7.63 % -11.10 % -5.06 % -5.06 % Expenses before incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Expenses after incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Total return before incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Total return after incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (5.21 ) (3.73 ) (4.65 ) (3.24 ) (2.16 ) (2.75 ) Net gain/(loss) on investments, net of non-controlling interests 17.28 19.94 24.96 13.01 16.72 20.18 Net income/(loss) 12.07 16.21 20.31 9.77 14.56 17.43 Net asset value, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Ratios to average net assets Net investment income/(loss) -15.82 % -9.78 % -9.78 % -13.39 % -7.34 % -7.34 % Expenses before incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Expenses after incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Total return before incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % Total return after incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2017 $ 116.41 $ 135.19 $ 125.68 $ 114.74 $ 133.27 $ 124.40 $ 81.35 $ 115.81 $ 93.59 $ 121.50 $ 97.99 Net operating results: Interest income 0.10 0.12 0.11 0.19 0.22 0.20 0.16 0.22 0.18 0.23 0.19 Expenses (3.56 ) (2.23 ) (2.07 ) (4.47 ) (3.94 ) (3.66 ) (2.42 ) (1.36 ) (1.10 ) (1.42 ) (1.15 ) Net gain/(loss) on investments, net of non-controlling interests (4.65 ) (6.21 ) (5.63 ) (11.13 ) (13.17 ) (12.17 ) (8.31 ) (8.15 ) (10.54 ) (8.56 ) (10.92 ) Net income/(loss) (8.11 ) (8.32 ) (7.59 ) (15.41 ) (16.89 ) (15.63 ) (10.57 ) (9.29 ) (11.46 ) (9.75 ) (11.88 ) Net asset value, June 30, 2018 $ 108.30 $ 126.87 $ 118.09 $ 99.33 $ 116.38 $ 108.77 $ 70.78 $ 106.52 $ 82.13 $ 111.75 $ 86.11 Ratios to average net assets Net investment income/(loss) -6.37 % -3.33 % -3.33 % -8.50 % -6.26 % -6.26 % -5.67 % -2.02 % -2.02 % -2.02 % -2.02 % Expenses before incentive fees (3)(4) 6.55 % 3.51 % 3.51 % 8.87 % 6.63 % 6.63 % 6.06 % 2.41 % 2.41 % 2.41 % 2.41 % Expenses after incentive fees (3)(4) 6.56 % 3.52 % 3.52 % 8.87 % 6.63 % 6.63 % 6.06 % 2.41 % 2.41 % 2.41 % 2.41 % Total return before incentive fees (2) -6.96 % -6.14 % -6.03 % -13.43 % -12.67 % -12.56 % -12.99 % -8.02 % -12.24 % -8.02 % -12.12 % Total return after incentive fees (2) -6.97 % -6.15 % -6.04 % -13.43 % -12.67 % -12.56 % -12.99 % -8.02 % -12.24 % -8.02 % -12.12 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2017 $ 135.96 $ 150.56 $ 202.90 $ 175.77 $ 175.18 $ 90.27 $ 100.02 $ 132.73 Net operating results: Interest income 0.08 0.08 0.11 0.10 0.10 0.00 0.00 0.00 Expenses (4.67 ) (3.10 ) (4.18 ) (3.63 ) (3.62 ) (2.13 ) (1.05 ) (1.42 ) Net gain/(loss) on investments, net of non-controlling interests (6.16 ) (6.86 ) (9.11 ) (7.91 ) (7.89 ) (13.39 ) (14.90 ) (19.75 ) Net income/(loss) (10.75 ) (9.88 ) (13.18 ) (11.44 ) (11.41 ) (15.52 ) (15.95 ) (21.17 ) Net asset value, June 30, 2018 $ 125.21 $ 140.68 $ 189.72 $ 164.33 $ 163.77 $ 74.75 $ 84.07 $ 111.56 Ratios to average net assets Net investment income/(loss) -6.94 % -3.95 % -3.95 % -3.95 % -3.95 % -5.38 % -2.38 % -2.38 % Expenses before incentive fees (3)(4) 6.72 % 3.72 % 3.72 % 3.72 % 3.72 % 5.38 % 2.38 % 2.38 % Expenses after incentive fees (3)(4) 7.06 % 4.07 % 4.07 % 4.07 % 4.07 % 5.38 % 2.38 % 2.38 % Total return before incentive fees (2) -7.56 % -6.22 % -6.15 % -6.16 % -6.17 % -17.19 % -15.95 % -15.95 % Total return after incentive fees (2) -7.91 % -6.56 % -6.50 % -6.51 % -6.51 % -17.19 % -15.95 % -15.95 % Frontier Global Fund (formerly Frontier Winton Fund) Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2017 $ 159.08 $ 176.44 $ 216.50 $ 121.19 $ 134.28 $ 179.70 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (7.15 ) (5.46 ) (6.87 ) (4.74 ) (3.48 ) (4.63 ) Net gain/(loss) on investments, net of non-controlling interests (3.27 ) (3.79 ) (6.16 ) (13.77 ) (15.34 ) (20.53 ) Net income/(loss) (10.42 ) (9.25 ) (13.03 ) (18.51 ) (18.82 ) (25.16 ) Net asset value, June 30, 2018 $ 148.66 $ 167.19 $ 203.47 $ 102.68 $ 115.46 $ 154.54 Ratios to average net assets Net investment income/(loss) -9.53 % -6.53 % -6.53 % -8.69 % -5.69 % -5.69 % Expenses before incentive fees (3)(4) 9.53 % 6.53 % 6.53 % 8.66 % 5.67 % 5.67 % Expenses after incentive fees (3)(4) 9.53 % 6.53 % 6.53 % 8.69 % 5.69 % 5.69 % Total return before incentive fees (2) -6.55 % -5.24 % -6.02 % -15.25 % -13.99 % -13.97 % Total return after incentive fees (2) -6.55 % -5.24 % -6.02 % -15.27 % -14.02 % -14.00 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.
Frontier Funds [Member]
Financial Highlights	7. Financial Highlights The following information presents the financial highlights of the Trust for the three and six months ended June 30, 2019 and 2018. This data has been derived from the information presented in the consolidated financial statements. Three months ended June 30 2019 2018 Ratios to average net assets (1) Net investment income/(loss) (1) -5.41 % -5.90 % Expenses before incentive fees (3) (4) 5.52 % 6.14 % Expenses after incentive fees (3) (4) 5.52 % 6.14 % Total return before incentive fees (2) 2.74 % 0.49 % Total return after incentive fees (2) 2.74 % 0.49 % Six months ended June 30 2019 2018 Ratios to average net assets (1) Net investment income/(loss) (1) -5.57 % -6.03 % Expenses before incentive fees (3) (4) -5.77 % 6.12 % Expenses after incentive fees (3) (4) -5.77 % 6.27 % Total return before incentive fees (2) 1.04 % -9.74 % Total return after incentive fees (2) 1.04 % -9.89 % (1) Annualized with the exception of incentive fees. (2) Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5. (4) Does not include management and incentive fees at Galaxy Plus. The Trust financial highlights are calculated based upon the Trust’s consolidated financial statements. The consolidated Trust does not issue units and therefore the financial highlights do not disclose any unitized data.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
Derivative Instruments and Hedging Activities	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Derivative Instruments and Hedging Activities	8. Derivative Instruments and Hedging Activities The Series’ primary business is to engage in speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts). The Series do not enter into or hold positions for hedging purposes as defined under ASC 815, Derivatives and Hedging The following tables summarize the monthly averages of forwards, options and futures contracts bought and sold for each respective Series of the Trust: For the Three Months ended June 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 228 275 For the Three Months Ended June 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 174 301 For the Six Months ended June 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 480 581 For the Six Months Ended June 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 1,522 1,518 The following tables summarize the trading revenues for the three and six months ended June 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ 64,042 Currencies (123,270 ) Energies (7,996 ) Interest rates 312,541 Metals 13,674 Stock indices (5,618 ) Realized trading income/(loss) (1) $ 253,372 Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ 18,952 Currencies (241,334 ) Energies (37,678 ) Interest rates 548,174 Metals 8,700 Stock indices (38,915 ) Realized trading income/(loss) (1) $ 257,898 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ (46,019 ) Currencies (222,765 ) Energies 19,021 Agriculturals 22,712 Interest rates (10,368 ) Stock indices (20,242 ) Realized trading income/(loss) (1) $ (257,661 ) Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ (105,544 ) Currencies (199,028 ) Energies 61,256 Agriculturals 50,782 Interest rates (97,212 ) Stock indices 6,410 Realized trading income/(loss) (1) $ (283,336 ) (1) Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures, forwards, and options. Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ (17,348 ) Currencies 16,367 Energies (7,260 ) Interest rates (99,664 ) Metals 4,519 Stock indices 9,106 Change in unrealized trading income/(loss) (1) $ (94,279 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ (41,639 ) Currencies (57,496 ) Energies 1,510 Interest rates (107,355 ) Metals 6,931 Stock indices 1,534 Change in unrealized trading income/(loss) (1) $ (196,516 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ 9,429 Currencies (61,638 ) Energies (5,285 ) Agriculturals (84,319 ) Interest rates (36,616 ) Stock indices (9,498 ) Change in unrealized trading income/(loss) (1) $ (187,927 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ 23,123 Currencies (101,409 ) Energies (51,468 ) Agriculturals (43,085 ) Interest rates 112,053 Stock indices (16,876 ) Change in unrealized trading income/(loss) (1) (77,662 ) (1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit). Certain financial instruments and derivative instruments are eligible for offset in the statements of financial condition under GAAP. The Series’ open trade equity/(deficit), options written, and receivables from futures commission merchants (each, an “FCM”) are subject to master netting arrangements and collateral arrangements and meet the GAAP guidance to qualify for offset. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. The Series’ policy is to recognize amounts subject to master netting arrangements on a net basis on the statements of financial condition. The following tables present gross and net information about the Series’ assets and liabilities subject to master netting arrangements as disclosed on the statements of financial condition as of June 30, 2019 and December 31, 2018. As of June 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 242,957 $ (201,096 ) $ 41,861 Swap Contracts 10,691,012 - $ 10,691,012 Frontier Diversified Fund Swap Contracts $ 5,881,358 $ - $ 5,881,358 Frontier Long/Short Commodity Fund Swap Contracts $ 435,901 $ - $ 435,901 Frontier Heritage Fund Swap Contracts $ 3,036,673 $ - $ 3,036,673 As of December 31, 2018 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 348,879 $ (128,220 ) $ 220,659 Swap Contracts 10,794,908 - $ 10,794,908 Frontier Diversified Fund Swap Contracts $ 5,920,414 $ - $ 5,920,414 Frontier Long/Short Commodity Fund Swap Contracts $ 479,102 $ - $ 479,102 Frontier Heritage Fund Swap Contracts $ 2,955,444 $ - $ 2,955,444
Frontier Funds [Member]
Derivative Instruments and Hedging Activities	8. Derivative Instruments and Hedging Activities The Trust’s primary business is to engage in speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts). The Trust does not enter into or hold positions for hedging purposes as defined under ASC 815. The detail of the fair value of the Trust’s derivatives by instrument types as of June 30, 2019 and December 31, 2018 is included in the Consolidated Condensed Schedules of Investments. See Note 4 for further disclosure related to the Trust’s positions in swap contracts. As further described in Note 6 above, there are management fees embedded in these swaps ranging from 1% to 1.5% accrued on the relevant notional amount of the swap and incentive fees embedded in these swaps ranging from 15% to 25% accrued based on the net new trading profits of the swaps. For the three months ended June 30, 2019 and June 30, 2018, the monthly average of forwards, options and futures contracts bought was approximately 230 and 707, respectively and sold was approximately 277 and 613, respectively. The following tables summarize the trading revenues for the three and six months ended June 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Agriculturals $ 64,042 Currencies (190,296 ) Energies (7,996 ) Interest rates 312,541 Metals 5,826 Stock indices (5,618 ) Realized trading income/(loss) (1) $ 178,497 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Metals $ 110,822 Currencies (735,456 ) Energies 1,237,113 Agriculturals 154,718 Interest rates 132,403 Stock indices (183,740 ) Realized trading income/(loss) (1) $ 715,860 Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Agriculturals $ 4,479 Currencies (690,957 ) Energies (592,892 ) Interest rates 865,211 Metals (611,514 ) Stock indices (73,178 ) Realized trading income/(loss) (1) $ (1,098,852 ) Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Metals $ 286,692 Currencies (1,063,187 ) Energies 972,529 Agriculturals (9,340 ) Interest rates (46,591 ) Stock indices (178,994 ) Realized trading income/(loss) (1) $ (38,891 ) (1) Amounts recorded in the Consolidated Statements of Operations under Net realized gain(loss) on futures forwards and options. Net Change in Open Trading Equity from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Agriculturals $ (17,348 ) Currencies 83,394 Energies 589 Interest rates (99,664 ) Metals 4,519 Stock indices 9,106 Change in unrealized trading income/(loss) (1) $ (19,404 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Metals $ 206,966 Currencies (9,676 ) Energies (90,184 ) Agriculturals (21,184 ) Interest rates 72,443 Stock indices 91,312 Change in unrealized trading income/(loss) (1) $ (249,677 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Agriculturals $ (96,927 ) Currencies 170,634 Energies 221,638 Interest rates (334,017 ) Metals 488,974 Stock indices 55,845 Change in unrealized trading income/(loss) (1) $ 506,148 Unrealized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Metals $ (382,688 ) Currencies (278,092 ) Energies (61,956 ) Agriculturals 21,007 Interest rates 384,926 Stock indices (197,437 ) Change in unrealized trading income/(loss) (1) $ (514,240 ) (1) Amounts recorded in the Consolidated Statements of Operations under Net change in open trade equity/(deficit) Certain financial instruments and derivative instruments are eligible for offset in the statements of financial condition under GAAP. The Trust’s open trade equity/(deficit), options written, and receivables from futures commission merchants (each, an “FCM”) are subject to master netting arrangements and collateral arrangements and meet the GAAP guidance to qualify for offset. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. The Trust’s policy is to recognize amounts subject to master netting arrangements on a net basis on the consolidated statements of financial condition. The following tables present gross and net information about the Trust’s assets and liabilities subject the master netting arrangements as disclosed on the consolidated statements of financial condition as of June 30, 2019 and December 31, 2018: As of June 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented Open Trade Equity/(Deficit) $ 242,957 $ (201,096 ) $ 41,861 Swap Contracts 20,044,944 - 20,044,944 As of December 31, 2018 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented Open Trade Equity/(Deficit) $ 3,244,057 $ (3,642,246 ) $ (398,189 ) Swap Contracts 20,149,868 - 20,149,868

Trading Activities and Related

Trading Activities and Related Risks	6 Months Ended
Trading Activities and Related Risks	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Trading Activities and Related Risks	9. Trading Activities and Related Risks The purchase and sale of futures and options on futures contracts require margin deposits with FCMs. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. A customer’s cash and other property (for example, U.S. treasury bills) deposited with an FCM are considered commingled with all other customer funds subject to the FCM’s segregation requirements. In the event of an FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited. The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the statements of financial condition, may result in future obligation or loss in excess of the amount paid by the Series for a particular investment. Each Trading Company expects to trade in futures, options, forward and swap contracts and will therefore be a party to financial instruments with elements of off-balance sheet market and credit risk. In entering into these contracts, there exists a market risk that such contracts may be significantly influenced by market conditions, such as interest rate volatility, resulting in such contracts being less valuable. If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time. In addition to market risk, trading futures, forward and swap contracts entails credit risk that a counterparty will not be able to meet its obligations to a Trading Company or Galaxy Plus entity. The counterparty for futures contracts traded in the United States and on most foreign exchanges is the clearinghouse associated with such exchange. In general, clearinghouses are backed by the corporate members of the clearinghouse who are required to share any financial burden resulting from the non-performance by one of their members and, as such, should significantly reduce this credit risk. In cases where the clearinghouse is not backed by the clearing members, like some foreign exchanges, it is normally backed by a consortium of banks or other financial institutions. Some non-U.S. exchanges, in contrast to U.S. exchanges, are principals’ markets in which performance is the responsibility only of the individual counterparty with whom the Trading Company has entered into the transaction, and not of the exchange or clearing corporation. In these kinds of markets, there is risk of bankruptcy or other failure or refusal to perform by the counterparty. In the case of forward contracts traded on the interbank market and swaps, neither is traded on exchanges. The counterparty is generally a single bank or other financial institution, rather than a group of financial institutions; thus there may be a greater counterparty credit risk. The Managing Owner expects the Trading Advisors to trade only with those counterparties which it believes to be creditworthy. All positions of each Trading Company will be valued each day on a mark-to-market basis. There can be no assurance that any clearing member, clearinghouse or other counterparty will be able to meet its obligations to any Trading Company. The Managing Owner has established procedures to actively monitor and minimize market and credit risks. The Limited Owners bear the risk of loss only to the extent of the market value of their respective investments and, in certain specific circumstances, distributions and redemptions received.
Frontier Funds [Member]
Trading Activities and Related Risks	9. Trading Activities and Related Risks The purchase and sale of futures and options on futures contracts require margin deposits with FCMs. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act, as amended (the “Commodity Exchange Act”), requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. A customer’s cash and other property (for example, U.S. treasury bills) deposited with an FCM are considered commingled with all other customer funds subject to the FCM’s segregation requirements. In the event of an FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited. The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the statements of financial condition, may result in future obligation or loss in excess of the amount paid by the Series for a particular investment. Each Trading Company and Galaxy Plus entity expects to trade in futures, options, forward and swap contracts and will therefore be a party to financial instruments with elements of off-balance sheet market and credit risk. In entering into these contracts, there exists a market risk that such contracts may be significantly influenced by market conditions, such as interest rate volatility, resulting in such contracts being less valuable. If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time. In addition to market risk, trading futures, forward and swap contracts entails credit risk that a counterparty will not be able to meet its obligations to a Trading Company or Galaxy Plus entity. The counterparty for futures contracts traded in the United States and on most foreign exchanges is the clearinghouse associated with such exchange. In general, clearinghouses are backed by the corporate members of the clearinghouse who are required to share any financial burden resulting from the non-performance by one of their members and, as such, should significantly reduce this credit risk. In cases where the clearinghouse is not backed by the clearing members, like some foreign exchanges, it is normally backed by a consortium of banks or other financial institutions. Some non-U.S. exchanges, in contrast to U.S. exchanges, are principals’ markets in which performance is the responsibility only of the individual counterparty with whom the Trading Company has entered into the transaction, and not of the exchange or clearing corporation. In these kinds of markets, there is risk of bankruptcy or other failure or refusal to perform by the counterparty. In the case of forward contracts traded on the interbank market and swaps, neither is traded on exchanges. The counterparty is generally a single bank or other financial institution, rather than a group of financial institutions; thus, there may be a greater counterparty credit risk. The Managing Owner expects the Trading Advisors to trade only with those counterparties which it believes to be creditworthy. All positions of each Trading Company will be valued each day on a mark-to-market basis. There can be no assurance that any clearing member, clearinghouse or other counterparty will be able to meet its obligations to any Trading Company. The Managing Owner has established procedures to actively monitor and minimize market and credit risks. The Limited Owners bear the risk of loss only to the extent of the market value of their respective investments and, in certain specific circumstances, distributions and redemptions received.

Indemnifications and Guarantees

Indemnifications and Guarantees	6 Months Ended
Indemnifications and Guarantees	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Indemnifications and Guarantees/Indemnifications and Guarantees noted in Management Discussion and Analysis	10. Indemnifications and Guarantees noted in Management Discussion and Analysis The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct. The Trust has had no prior claims or payments pursuant to these agreements. The Trust’s individual maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Trust that have not yet occurred. However, based on experience the Trust expects the risk of loss to be remote. Maximum exposure is unfulfilled obligations of the Series up to the amount of equity at risk with the custodian of the referenced Series as allocated from the Trading Company. The Series have not recorded any liability for the indemnifications in the accompanying financial statements as it expects any possibility of losses to be remote.
Frontier Funds [Member]
Indemnifications and Guarantees/Indemnifications and Guarantees noted in Management Discussion and Analysis	10. Indemnifications and Guarantees The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct. The Trust has had no prior claims or payments pursuant to these agreements. The Trust’s individual maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Trust that have not yet occurred. However, based on experience the Trust expects the risk of loss to be remote. Maximum exposure is unfulfilled obligations of the Trust up to the amount of equity at risk with the custodians of the Trust. The Trust has not recorded any liability for the guarantees in the accompanying financial statements as it expects any possibility of losses to be remote. The Trust has not recorded any liability for the indemnifications in the accompanying financial statements as it expects any possibility of losses to be remote.

Subsequent Events

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Subsequent Events	11. Subsequent Events The Managing Owner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The Managing Owner has assessed the subsequent events through the date that the financial statements were issued and has determined that, except as set forth below, there were no subsequent events requiring adjustment to or disclosure in the financial statements. From July 1, 2019 through August 14, 2019, Frontier Balanced Fund, Frontier Diversified Fund, Frontier Heritage Fund, Frontier Long/Short Commodity Fund, Frontier Masters Fund, Frontier Select Fund, and Frontier Global Fund paid 902,280, 308,070, 59,320, 28,409, 121,292, 121,641 and 119,800, respectively, in redemptions.
Frontier Funds [Member]
Subsequent Events	11. Subsequent Events The Managing Owner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The Managing Owner has assessed the subsequent events through the date that the financial statements were issued and has determined that, except as set forth below, there were no subsequent events requiring adjustment to or disclosure in the financial statements. From July 1, 2019 through August 14, 2019, the Trust paid $1,660,812 in redemptions.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Basis of Presentation	Basis of Presentation
Consolidation	Consolidation Investments in Trading Companies in which a Series does not have a controlling and majority interest and all interests in Galaxy Plus entities are accounted for using net asset value as the practical expedient, which approximates fair value. Fair value represents the proportionate share of the Series’ interest in the NAV in a Trading Company or Galaxy Plus entity. The equity interest held by Series of the Trust is shown as investments in unconsolidated Trading Companies or investments in private investment companies in the statements of financial condition. The income or loss attributable thereto in proportion of investment level is shown in the statements of operations as change in fair value of investments in unconsolidated Trading Companies or net unrealized gain/(loss) on private investment companies. Galaxy Plus entities are co-mingled investment vehicles. In addition to the Series, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series’ ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.
Use of Estimates	Use of Estimates—
Cash and Cash Equivalents	Cash and Cash Equivalents—
Interest Income	Interest Income—
U.S. Treasury Securities	U.S. Treasury Securities— Fair Value Measurements and Disclosures (“
Receivable from Futures Commission Merchants	Receivable From Futures Commission Merchants
Investment Transactions	Investment Transactions— Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest is recognized in the period earned and the instruments are marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the statements of operations.
Purchase and Sales of Private Investment Companies	Purchase and Sales of Private Investment Companies
Foreign Currency Transactions	Foreign Currency Transactions —
Allocation of Earnings	Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific Series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities.
Investments and Swaps	Investments and Swaps
Income Taxes	Income Taxes Income Taxes In the opinion of the Managing Owner, (i) the Trust, with respect to the Series, is treated as a partnership for federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Units of the Trust.
Fees and Expenses	Fees and Expenses
Incentive Fee (rebate)	Incentive Fee (rebate)—
Service Fees	Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $23,105, $31,765, $136, $296,547, $14,233, $145,067 and $53,155 for the Frontier Diversified, Masters, Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively, as of June 30, 2019 and $20,430, $28,100, none, $258,194, $11,162, $133,281 and $46,159 respectively, as of December 31, 2018. These service fees are part of the offering costs of the Trust, with respect to the Series, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.
Pending Owner Additions	Pending Owner Additions—
Owner redemptions payable	Owner redemptions payable—
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements—
Subsequent Events	Subsequent Events Subsequent Events
Frontier Funds [Member]
Basis of Presentation	Basis of Presentation
Consolidation	Consolidation Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.
Use of Estimates	Use of Estimates—
Cash and Cash Equivalents	Cash and Cash Equivalents—
Interest Income	Interest Income—
U.S. Treasury Securities	U.S. Treasury Securities— Fair Value Measurements and Disclosures (“
Receivable from Futures Commission Merchants	Receivable from Futures Commission Merchants—
Investment Transactions	Investment Transactions— Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the consolidated statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest was recognized in the period earned and the instruments were marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the consolidated statements of operations.
Purchase and Sales of Private Investment Companies	Purchase and Sales of Private Investment Companies
Foreign Currency Transactions	Foreign Currency Transactions—
Allocation of Earnings	Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust, or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities.
Investments and Swaps	Investments and Swaps—
Income Taxes	Income Taxes Income Taxes In the opinion of the Managing Owner, (i) the Trust is treated as a partnership for Federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material Federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Series Units of the Trust.
Fees and Expenses	Fees and Expenses—
Incentive Fee (rebate)	Incentive Fee (rebate)—
Service Fees	Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $497,326 and $564,008 as of December 31, 2018 and June 30, 2019, respectively. These service fees are part of the offering costs of the Trust, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.
Pending Owner Additions	Pending Owner Additions
Owner redemptions payable	Owner redemptions payable—
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements—
Subsequent Events	Subsequent Events Subsequent Events

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
Fair Value Measurements (Tables)	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Schedule of financial asset portfolio measured at fair value	The following table summarizes investment in each Series measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. Level 1 Level 2 Level 3 Total June 30, 2019 Inputs Inputs Inputs Fair Value Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 18,043 $ - $ - $ 18,043 Swap Contracts - - 5,881,358 5,881,358 U.S. Treasury Securities 191,059 - - 191,059 Frontier Masters Fund Investment in Unconsolidated Trading Companies 36,495 - - 36,495 U.S. Treasury Securities 386,444 - - 386,444 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 12,761 - - 12,761 Swap Contracts - - 435,901 435,901 U.S. Treasury Securities 135,126 - - 135,126 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 6,230 - - 6,230 Open Trade Equity (Deficit) 103,838 (61,691 ) - 42,147 Swap Contracts - - 10,691,012 10,691,012 U.S. Treasury Securities 65,967 - - 65,967 Frontier Select Fund Investment in Unconsolidated Trading Companies 36,809 - 551,100 587,909 U.S. Treasury Securities 389,753 - - 389,753 Frontier Global Fund Investment in Unconsolidated Trading Companies 18,384 - - 18,384 U.S. Treasury Securities 194,665 - - 194,665 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 24,242 - - 24,242 Swap Contracts - - 3,036,673 3,036,673 U.S. Treasury Securities 256,696 - - 256,696 Level 1 Level 2 Level 3 Total December 31, 2018 Inputs Inputs Inputs Fair Value Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 1,157,971 $ 2,939 $ - $ 1,160,910 Swap Contracts - - 5,920,414 5,920,414 U.S. Treasury Securities 1,553,261 - - 1,553,261 Frontier Masters Fund Investment in Unconsolidated Trading Companies 772,732 2,356 - 775,088 U.S. Treasury Securities 152,384 - - 152,384 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 28,163 - - 28,163 Swap Contracts - - 479,102 479,102 U.S. Treasury Securities 202,415 - - 202,415 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 1,739,609 5,390 - 1,744,999 Open Trade Equity (Deficit) 242,860 (22,201 ) - 220,659 Swap Contracts - - 10,794,908 10,794,908 U.S. Treasury Securities 123,409 - - 123,409 Frontier Select Fund Investment in Unconsolidated Trading Companies 11,462 - 511,718 523,180 U.S. Treasury Securities 82,386 - - 82,386 Frontier Global Fund (formerly Frontier Winton Fund) Investment in Unconsolidated Trading Companies 4,280,023 12,052 - 4,292,075 U.S. Treasury Securities 3,126,551 - - 3,126,551 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 724,614 2,072 - 726,686 Swap Contracts - - 2,955,444 2,955,444 U.S. Treasury Securities 443,921 - - 443,921
Schedule of change in Level 3 assets measured at fair value on recurring basis	For the Six Months ending June 30, 2019 Swaps Frontier Balanced Fund Frontier Long/Short Commodity Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 10,794,908 $ 479,102 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized (103,896 ) (43,201 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of June 30, 2019 $ 10,691,012 $ 435,901 Frontier Diversified Fund Frontier Heritage Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 5,920,414 $ 2,955,444 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized (39,055 ) 81,229 Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of June 30, 2019 $ 5,881,359 $ 3,036,673 For the Six Months ending June 30, 2019 Investments in Unconsolidated Trading Companies: Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 511,718 Change in fair value of investments in unconsolidated trading companies 39,383 Purchases of investments of unconsolidated trading companies - Change in ownership allocation - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of June 30, 2019 $ 551,101 For the Year Ended December 31, 2018 Swaps Frontier Balanced Fund Frontier Long/Short Commodity Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 11,340,959 $ 397,039 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 1,453,948 82,063 Proceeds from collateral reduction (1,999,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 10,794,908 $ 479,102 Frontier Diversified Fund Frontier Heritage Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 6,376,472 $ 3,094,367 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 643,941 (138,923 ) Proceeds from collateral reduction (1,099,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 5,920,414 $ 2,955,444 For the Year Ended December 31, 2018 Investments in Unconsolidated Trading Companies: Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 579,073 Change in fair value of investments in unconsolidated trading companies (67,355 ) Purchases of investments of unconsolidated trading companies - Change in ownership allocation - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2018 $ 511,718
Schedule of change in unrealized appreciation (depreciation)	The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at June 30, 2019: Frontier Diversified Frontier Long/Short Commodity Frontier Balanced Frontier Heritage Fund Fund Fund Fund Swap Contracts $ (39,055 ) $ (43,201 ) $ (103,896 ) $ 81,229 Frontier Select Fund Investments in Unconsolidated Trading Companies $ 37,710 The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2018: Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 643,941 $ 82,063 $ 1,453,948 $ (138,923 ) Frontier Select Fund Investments in Unconsolidated Trading Companies $ (67,355 )
Frontier Funds [Member]
Schedule of financial asset portfolio measured at fair value	The following table summarizes the instruments that comprise the Trust’s financial asset portfolio, by Series in aggregate, measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. June 30, 2019 Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Open Trade Equity (Deficit) $ 103,838 $ (61,691 ) $ - $ 42,147 Swap Contracts - - 20,044,944 20,044,944 U.S. Treasury Securities 1,619,710 - - 1,619,710 December 31, 2018 Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Open Trade Equity (Deficit) $ (400,796 ) $ 2,607 $ - $ (398,189 ) Swap Contracts - - 20,149,868 20,149,868 U.S. Treasury Securities 5,684,327 - - 5,684,327
Schedule of change in Level 3 assets measured at fair value on recurring basis	The changes in Level 3 assets measured at fair value on a recurring basis are summarized in the following tables. Swap contract asset gains and losses (realized/unrealized) included in earnings are classified in “realized and unrealized gain (loss) on investments – net unrealized gain/(loss) on swap contracts” on the Consolidated Statement of Operations. For the Balance of recurring Level 3 assets as of January 1, 2018 20,149,868 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized (104,923 ) Proceeds from collateral reduction Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of June 30, 2019 20,044,945
Schedule of change in unrealized appreciation (depreciation)	The total change in unrealized appreciation (depreciation) included in the consolidated statements of operations attributable to level 3 investments still held at June 30, 2019: Swaps $ (104,924 ) The total change in unrealized appreciation (depreciation) included in the consolidated statements of operations attributable to level 3 investments still held at December 31, 2018: Swaps $ 2,041,028

Swaps Contracts (Tables)

Swaps Contracts (Tables)	6 Months Ended
Swaps Contracts (Tables)	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Schedule of Investments in following swap	The Series have invested in the following swaps as of and for the six months ended June 30, 2019: Frontier Balanced Fund Frontier Diversified Fund Frontier Frontier Total Return Total Return Total Return Total Return Counterparty Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Deutsche Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 10,605,012 $ 5,747,765 $ 431,716 $ 1,929,799 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ (103,896 ) $ (39,056 ) $ (43,201 ) $ 81,229 Fair Value as of June 30, 2019 $ 10,691,012 $ 5,833,765 $ 461,666 $ 2,905,249 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Series have invested in the following swaps as of and for the year ended December 31, 2018: Frontier Frontier Frontier Frontier Total Return Total Return Total Return Total Return Counterparty Deutsche Deutsche Deutsche Deutsche Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )
Frontier Funds [Member]
Schedule of Investments in following swap	The Trust had invested in the following swap contracts as of and for the six months ended June 30, 2019: XXXIV Balanced XXXV Diversified XXXVII L/S Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 10,605,012 $ 5,747,765 $ 431,716 $ 1,929,799 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ (103,896 ) $ (39,056 ) $ (43,201 ) $ 81,229 Fair Value as of June 30, 2019 $ 10,691,012 $ 5,833,765 $ 461,666 $ 2,905,249 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Trust had invested in the following swap contracts as of and for the year ended December 31, 2018: XXXIV Balanced XXXV Diversified XXXVII L/S Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Deutsche Bank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )

Investments in Private Investme

Investments in Private Investment Companies (Tables)	6 Months Ended
Investments in Private Investment Companies (Tables)	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Investments in Unconsolidated Trading Companies	The following table summarizes each of the Series’ investments in unconsolidated Trading Companies as of June 30, 2019 and December 31, 2018: As of June 30, 2019 As of December 31, 2018 Series Percentage of Series Total Capital Invested in Unconsolidated Trading Companies Fair Value Percentage of Series Total Capital Invested in Unconsolidated Trading Companies Fair Value Frontier Diversified Series — Frontier Trading Companies II and XXXVIII 0.14 % $ 18,043 7.19 % $ 1,160,910 Frontier Masters Fund — Frontier Trading Companies II and XXXVIII 1.03 % $ 36,495 13.91 % $ 775,088 Frontier Long/Short Commodity Fund — Frontier Trading Company XXXVIII 0.60 % $ 12,761 1.15 % $ 28,163 Frontier Balanced Fund — Frontier Trading Companies II and XXXVIII 0.03 % $ 6,230 5.48 % $ 1,744,999 Frontier Select Fund — Frontier Trading Companies XXXVIII and XXXIX 15.96 % $ 587,909 13.56 % $ 523,180 Frontier Global Fund — Frontier Trading Companies II and XXXVIII 0.30 % $ 18,384 52.30 % $ 4,292,075 Frontier Heritage Fund — Frontier Trading Companies II and XXXVIII 0.60 % $ 24,242 16.27 % $ 726,686
Schedule of equity in earnings from private investment companies	The following tables summarize each of the Series’ equity in earnings from unconsolidated Trading Companies and private investment companies for the six and three months ended June 30, 2019 and 2018. Trading Realized Change in Net Income Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ (138,899 ) $ (138,899 ) Frontier Trading Company XXXVIII, LLC - - (732 ) (732 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (22,370 ) 635,922 201,668 815,220 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (17,895 ) 46,071 (78,813 ) (50,637 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (173,562 ) (1,016,391 ) (35,635 ) (1,225,588 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (18,736 ) 1,292,724 (74,396 ) 1,199,592 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 286,677 286,677 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (49,975 ) (936,608 ) 185,088 (801,495 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (25,311 ) 24,230 (121,258 ) (122,339 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,786 ) 45,834 20,454 59,502 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (45,648 ) 986,448 (396,129 ) 544,671 Total $ (360,283 ) $ 1,078,230 $ (151,975 ) $ 565,972 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ (337,431 ) $ (337,431 ) Frontier Trading Company XXXVIII, LLC - - (14,574 ) (14,574 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (153,661 ) 1,206,683 134,763 1,187,785 Total $ (153,661 ) $ 1,206,683 $ (217,242 ) $ 835,780 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 39,383 $ 39,383 Frontier Trading Company XXXVIII, LLC - - (1,672 ) (1,672 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (33,911 ) 222,739 (47,068 ) 141,760 Galaxy Plus Fund - TT Feeder Fund (531) LLC (44,428 ) 259,691 (73,313 ) 141,950 Total $ (78,339 ) $ 482,430 $ (82,670 ) $ 321,421 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ (59,538 ) $ (59,538 ) Frontier Trading Company XXXVIII, LLC - - (4,379 ) (4,379 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (41,734 ) 245,955 67,220 271,441 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (49,687 ) 284,089 (63,499 ) 170,903 Total $ (91,421 ) $ 530,044 $ (60,196 ) $ 378,427 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,029 ) $ (1,029 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (37,828 ) (379,307 ) 229,576 (187,559 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 142,869 142,869 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (24,026 ) 125,486 (44,529 ) 56,931 Total $ (61,854 ) $ (253,821 ) $ 326,887 $ 11,212 Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ (76,616 ) $ (76,616 ) Frontier Trading Company XXXVIII, LLC - - (8,996 ) (8,996 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (19,559 ) 379,795 103,977 464,213 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (14,073 ) 28,047 (48,988 ) (35,014 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (108,956 ) (912,164 ) 268,101 (753,019 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (20,998 ) 811,110 (57,565 ) 732,547 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 144,793 144,793 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (35,222 ) (573,436 ) 114,005 (494,653 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (13,254 ) 10,639 (7,477 ) (10,092 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,948 ) 45,318 20,527 57,897 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (34,002 ) 603,982 (196,808 ) 373,172 Total $ (254,012 ) $ 393,291 $ 254,953 $ 394,232 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (65,952 ) $ (65,952 ) Frontier Trading Company XXXVIII, LLC - - (1,558 ) (1,558 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (31,863 ) 231,766 69,765 269,668 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (81,588 ) (163,846 ) (188,680 ) (434,114 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (17,916 ) 77,286 47,910 107,280 Galaxy Plus Fund - TT Feeder Fund (531) LLC (38,936 ) 214,809 (83,135 ) 92,738 Total $ (170,303 ) $ 360,015 $ (221,650 ) $ (31,938 ) Six Months Ended June 30, 2018 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income (Loss) Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ 67,960 $ 67,960 Frontier Trading Company XXXVIII, LLC - - (11,476 ) (11,476 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (43,897 ) (212,016 ) 6,928 (248,985 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (31,385 ) (158,568 ) 1,111 (188,842 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (228,504 ) 369,476 13,457 154,429 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (36,360 ) (138,701 ) 10,762 (164,299 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (123 ) - (3,585 ) (3,708 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (73,528 ) (905,417 ) 60,858 (918,087 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (62,551 ) (72,693 ) 12,369 (122,875 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (13,928 ) (42,692 ) 3,166 (53,454 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (137,437 ) (1,613,467 ) 86,852 (1,664,052 ) Total $ (627,713 ) $ (2,774,078 ) $ 248,402 $ (3,153,389 ) Frontier Winton Fund — Frontier Trading Company II, LLC $ - $ - $ (186,556 ) $ (186,556 ) Frontier Trading Company XXXVIII, LLC - - (66,205 ) (66,205 ) Total $ - $ - $ (252,761 ) $ (252,761 ) Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ $ - $ (41,578 ) $ (41,578 ) Frontier Trading Company XXXVIII, LLC - - 4,561 4,561 Galaxy Plus Fund - TT Feeder Fund (531) LLC (61,704 ) (525,255 ) 67,762 (519,197 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (80,091 ) (94,447 ) (208,032 ) (382,570 ) Total $ (141,795 ) $ (619,702 ) $ 30,745 $ 556,214 Frontier Heritage Fund — Frontier Trading Company II, LLC $ $ - $ 6,663 $ 6,663 Frontier Trading Company XXXVIII, LLC - - (4,695 ) (4,695 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (95,378 ) (550,409 ) 44,752 (601,035 ) Total $ (95,378 ) $ (550,409 ) $ 46,720 $ (599,067 ) Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,812 ) $ (1,812 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (55,540 ) (106,500 ) (43,080 ) 7,880 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (681 ) - (55,507 ) (56,188 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (44,616 ) (236,487 ) 13,305 (267,798 ) Total $ (56,221 ) $ (129,987 ) $ (87,094 ) $ (317,918 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ 6,222 $ 6,222 Frontier Trading Company XXXVIII, LLC - - (1,820 ) (1,820 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (21,609 ) (70,821 ) 2,309 (90,121 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (19,728 ) (71,041 ) 1,112 (89,657 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (88,315 ) 190,256 (45,473 ) 56,468 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (19,585 ) (13,078 ) 8,453 (24,210 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (62 ) 3,942 3,880 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (41,686 ) (336,175 ) 1,742 (376,119 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (37,240 ) (25,944 ) 5,361 (57,823 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (15,597 ) (42,800 ) 3,166 (55,231 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (72,444 ) (772,916 ) 23,417 (821,943 ) Total $ (316,204 ) $ (1,142,581 ) $ 8,431 $ (1,450,354 ) Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (94,552 ) $ (94,552 ) Frontier Trading Company XV, LLC - - - - Frontier Trading Company XXXVIII, LLC - - 17,218 17,218 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - (76,396 ) 68,413 ) (7,983 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (149,210 ) 263,055 (103,684 ) 10,161 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (100,181 ) (726,950 ) 13,640 (813,491 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (47,188 ) (87,994 ) (179,255 ) (314,437 ) Total $ (296,579 ) $ (628,285 ) $ (278,220 ) $ (1,203,084 ) Three Months Ended June 30, 2019 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income (Loss) Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ 382 $ 382 Frontier Trading Company XXXVIII, LLC - - (1,743 ) (1,743 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (7,956 ) 500,989 (261,813 ) 231,220 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (7,282 ) 9,117 (12,265 ) (10,430 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (104,751 ) (3,311,760 ) 2,622,781 (793,730 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (9,768 ) 526,833 (184,438 ) 332,627 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 305,427 305,427 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (21,074 ) (328,285 ) 179,439 (169,920 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (105,511 ) (105,511 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (2,518 ) 56,051 (6,885 ) 46,648 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (21,136 ) 1,171,891 (437,703 ) 713,052 Total $ (174,485 ) $ (1,375,164 ) $ 2,097,671 $ 548,022 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ (23,564 ) $ (23,564 ) Frontier Trading Company XXXVIII, LLC - - (178 ) (178 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (99,335 ) 940,770 (341,757 ) 499,678 Total $ (99,335 ) $ 940,770 $ (365,499 ) $ 475,936 Frontier Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 63,719 $ 63,719 Frontier Trading Company XXXVIII, LLC - - (535 ) (535 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (18,439 ) 189,845 (130,938 ) 40,468 Galaxy Plus Fund - TT Feeder Fund (531) LLC (20,114 ) 312,950 (81,412 ) 211,424 Total $ (38,553 ) $ 502,795 $ (149,166 ) $ 315,076 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ (5,368 ) $ (5,368 ) Frontier Trading Company XXXVIII, LLC - - (1,597 ) (1,597 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (24,706 ) 183,352 (87,492 ) 71,154 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (21,610 ) 341,761 (83,040 ) 237,111 Total $ (46,316 ) $ 525,113 $ (177,497 ) $ 301,300 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (469 ) $ (469 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (22,997 ) (636,737 ) 537,573 (122,161 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 172,203 172,203 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (11,740 ) 151,888 (42,868 ) 97,280 Total $ (34,737 ) $ (484,849 ) $ 666,439 $ 146,853 Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ (711 ) $ (711 ) Frontier Trading Company XXXVIII, LLC - - (403 ) (403 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (9,102 ) 292,763 (123,620 ) 160,041 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (6,039 ) 5,628 (8,508 ) (8,919 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (67,124 ) (2,123,330 ) 1,689,124 (501,330 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (11,268 ) 351,448 (127,805 ) 212,375 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 152,338 152,338 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (15,429 ) (184,729 ) 103,314 (96,844 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (700 ) (700 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (2,990 ) 50,835 (9,848 ) 37,997 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (16,278 ) 685,223 (254,362 ) 414,583 Total $ (128,230 ) $ (922,162 ) $ 1,418,819 $ 368,427 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (4,502 ) $ (4,502 ) Frontier Trading Company XXXVIII, LLC - - (1,781 ) (1,781 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (17,715 ) 168,928 (60,575 ) 90,638 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (41,279 ) (1,069,832 ) 878,048 (233,063 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (7,140 ) 82,721 (37,533 ) 38,048 Galaxy Plus Fund - TT Feeder Fund (531) LLC (15,303 ) 283,646 (88,757 ) 179,586 Total $ (81,437 ) $ (534,537 ) $ 684,900 $ 68,926 Three Months Ended June 30, 2018 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income (Loss) Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ 302,930 $ 302,930 Frontier Trading Company XXXVIII, LLC - - (6,881 ) (6,881 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (13,073 ) (158,310 ) 72,621 98,762 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (14,629 ) 131,409 (38,608 ) 78,172 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (141,047 ) (430,258 ) 805,293 233,988 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (14,285 ) 333,049 (63,193 ) 255,571 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (123 ) - (38,889 ) (39,012 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (37,583 ) 292,017 423,980 678,414 Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (21,107 ) (149,161 ) 18,142 (152,126 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,130 ) (53,768 ) 25,289 (35,609 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (63,787 ) (25,610 ) (33,194 ) (122,591 ) Total $ (312,764 ) $ (60,632 ) $ 1,467,490 $ 1,094,094 Frontier Winton Fund — Frontier Trading Company II LLC $ - $ - $ 675,380 $ 675,380 Frontier Trading Company XXXVIII, LLC - - (29,123 ) (29,123 ) Total $ - $ - $ 646,257 $ 646,257 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ (41,578 ) $ (41,578 ) Frontier Trading Company XXXVIII, LLC - - (1,017 ) (1,017 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (10,721 ) 23,055 37,712 50,046 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (42,595 ) (12,170 ) (16,423 ) (71,188 ) Total $ (53,316 ) $ 10,885 $ (21,306 ) $ (63,737 ) Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ 129,198 $ 129,198 Frontier Trading Company XXXVIII, LLC - - (3,728 ) (3,728 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (42,603 ) (5,832 ) (12,130 ) (60,565 ) Total $ (42,603 ) $ (5,832 ) $ 113,340 $ 64,905 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,870 ) $ (1,870 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (25,765 ) (63,680 ) (118,815 ) 29,370 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (681 ) - (148,965 ) (149,646 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (19,032 ) (6,922 ) (3,573 ) (29,527 ) Total $ (45,478 ) $ (70,602 ) $ (35,593 ) $ (151,673 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ 156,848 $ 156,848 Frontier Trading Company XXXVIII, LLC - - (2,803 ) (2,803 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (5,137 ) (52,919 ) 24,207 (33,849 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (9,617 ) 72,926 (21,449 ) 41,860 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (41,617 ) (209,611 ) 350,445 99,217 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (9,912 ) (139,185 ) (24,276 ) 104,997 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (62 ) (13,567 ) (13,629 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (20,301 ) 132,708 177,519 (289,926 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (11,738 ) (64,178 ) 8,247 (67,669 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,950 ) (53,876 ) 25,289 (35,537 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (31,712 ) 3,362 (22,990 ) (51,340 ) Total $ (137,984 ) $ (32,465 ) $ 657,470 $ 487,021 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ 148,044 $ (94,552 ) Frontier Trading Company XXXVIII, LLC - - 8,804 - Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (70,572 ) (207,046 ) 370,789 93,171 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (44,250 ) (27,294 ) (16,449 ) (87,993 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (9,581 ) 27,308 35,040 52,767 Total $ (124,403 ) $ (207,032 ) $ 546,228 $ 214,793
Schedule of private investment companies have certain redemption and liquidity restrictions	The Series’ investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table: Redemptions Redemptions Liquidity Notice Period Permitted Restrictions Frontier Diversified Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Masters Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Long/Short Commodity Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Balanced Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Select Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Heritage Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Frontier Global Fund Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None
Frontier Funds [Member]
Schedule of equity in earnings from private investment companies	The following table summarizes the Trust’s equity in earnings from each of the private investment companies during the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (158,814 ) 2,086,802 (875,257 ) 1,052,731 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (13,321 ) 14,745 (20,773 ) (19,349 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (236,151 ) (7,141,659 ) 5,727,526 (1,650,284 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (21,036 ) 878,281 (312,243 ) 545,002 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 629,968 629,968 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (36,503 ) (513,014 ) 282,753 (266,764 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (106,211 ) (106,211 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (5,508 ) 106,886 (16,733 ) 84,645 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (48,550 ) (48,550 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (35,417 ) 596,596 (170,169 ) 391,010 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (96,343 ) 2,623,329 (986,444 ) 1,540,542 Total $ (603,093 ) $ (1,348,034 ) $ 4,103,867 $ 2,152,740 Three Months Ended June 30, 2018 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (18,210 ) $ (211,229 ) $ 96,828 $ (132,611 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (24,246 ) 204,335 (60,057 ) 120,032 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (279,001 ) (910,595 ) 1,645,342 455,746 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (24,197 ) 472,234 (87,469 ) 360,568 Galaxy Plus Fund - LRR Feeder Fund (522) LLC (804 ) (62 ) (201,421 ) (202,287 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (57,884 ) 424,725 601,499 968,340 Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (32,845 ) (213,339 ) 26,389 (219,795 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (15,080 ) (107,644 ) 50,578 (72,146 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (49,181 ) (49,181 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (20,302 ) 50,363 72,752 102,813 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (240,251 ) (74,466 ) (104,759 ) (419,476 ) Total $ (712,820 ) $ (365,678 ) $ 1,990,501 $ 912,003 Six Months Ended June 30, 2019 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (269,187 ) 2,700,121 577,393 3,008,327 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (31,968 ) 74,118 (127,801 ) (85,651 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (401,934 ) (2,471,708 ) 273,362 (2,600,280 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (39,734 ) 2,103,831 (131,961 ) 1,932,139 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 574,339 574,339 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (85,197 ) (1,510,044 ) 299,093 (1,296,148 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (38,565 ) 34,869 (128,735 ) (132,431 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (14,734 ) 91,152 40,981 117,399 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (80,033 ) (80,033 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (83,364 ) 474,500 (156,448 ) 234,688 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (205,190 ) 2,300,30 (700,123 ) 1,394,717 Total $ (1,169,873 ) $ 3,796,872 $ 440,067 $ 3,067,066 Six Months Ended June 30, 2018 Trading Commissions Realized Gain/(Loss) Change in Unrealized Gain/(Loss) Net Income (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (68,124 ) $ (282,837 ) $ 9,237 $ (341,724 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - (76,396 ) 68,413 (7,983 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (51,029 ) (229,609 ) 2,223 (278,415 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (521,358 ) 929,287 (178,780 ) 229,149 Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (53,977 ) (151,779 ) 19,215 (186,541 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (804 ) (62 ) (54,811 ) (55,677 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (115,169 ) (944,354 ) 62,600 (996,923 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (99,908 ) (98,637 ) 17,730 (180,815 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (29,450 ) (83,146 ) 6,332 (106,264 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (76,792 ) (76,792 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (95,405 ) (147,216 ) (333,152 ) (575,773 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (543,620 ) (4,460,709 ) 195,593 (4,808,736 Total $ (1,578,844 ) $ (5,545,458 ) $ (262,192 ) $ (7,386,494 )
Schedule of private investment companies have certain redemption and liquidity restrictions	The Trust’s investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table: Redemptions Notice Period Redemptions Permitted Liquidity Restrictions Frontier Funds Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None

Transactions with Affiliates (T

Transactions with Affiliates (Tables) - The Series of the Frontier Funds [Member]	6 Months Ended
	Jun. 30, 2019
Schedule of fees earned by managing owner	The following table summarizes fees earned by the Managing Owner for the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 Incentive (Rebate) Fees Management Fee Service Fee Trading Fee Frontier Diversified Fund $ - $ - $ 11,366 $ 126,026 Frontier Masters Fund - 2,072 2,268 58,718 Frontier Long/Short Commodity Fund - - 152 14,365 Frontier Balanced Fund - 5,286 154,061 248,123 Frontier Select Fund - - 26,562 22,475 Frontier Global Fund - 9,531 42,779 82,598 Frontier Heritage Fund - 1,100 20,713 29,653 Three Months Ended June 30, 2018 Incentive Fees (rebate) Management Fees Risk Analysis Fees Service Fees Trading Fees Frontier Diversified Fund $ - $ 13,229 $ - $ 14,689 $ 143,613 Frontier Masters Fund - 28,862 - 12,929 105,998 Frontier Long/Short Commodity Fund - - - 407 21,519 Frontier Balanced Fund - 22,566 1,692 237,810 344,769 Frontier Select Fund - - - 33,273 28,109 Frontier Winton Fund - 131,682 - 80,907 80,703 Frontier Heritage Fund - 33,893 - 31,302 36,855 Six Months Ended June 30, 2019 Incentive (Rebate) Fees Management Fee Service Fee Trading Fee Frontier Diversified Fund $ - $ 2,668 $ 23,395 $ 256,330 Frontier Masters Fund - 7,665 9,754 126,036 Frontier Long/Short Commodity Fund - - 314 28,217 Frontier Balanced Fund - 13,365 324,926 527,460 Frontier Select Fund - - 52,067 45,107 Frontier Global Fund - 38,679 94,902 125,313 Frontier Heritage Fund - 7,289 43,898 56,746 Six Months Ended June 30, 2018 Incentive Fees (rebate) Management Fees Risk Analysis Fees Service Fees Trading Fees Frontier Diversified Fund $ 1,881 $ 24,792 $ - $ 30,804 $ 308,763 Frontier Masters Fund - 61,211 - 27,898 240,046 Frontier Long/Short Commodity Fund - - - 1,064 46,212 Frontier Balanced Fund 145,134 42,902 3,529 500,791 728,945 Frontier Select Fund - - - 72,962 65,703 Frontier Winton Fund - 262,342 - 175,167 163,278 Frontier Heritage Fund 1,394 69,874 - 68,410 79,147
Schedule of fees payable to managing owner	The following table summarizes fees payable to the Managing Owner as of June 30, 2019 and December 31, 2018. Incentive Fees Management Fees Interest Fees Service Fees Trading Fees Risk Analysis Fees Frontier Diversified Fund $ - $ - $ - $ 2,464 $ 36,982 $ - Frontier Masters Fund - - - 201 14,956 - Frontier Long/Short Commodity Fund - - - 4 4,793 - Frontier Balanced Fund - 8,828 - 45,227 76,075 9,994 Frontier Select Fund - - 335 8,212 7,120 - Frontier Global Fund - - 660 12,926 23,122 - Frontier Heritage Fund - - 635 6,240 10,467 - As of December 31, 2018 Incentive Fees Management Interest Fees Service Fees Trading Fees Frontier Diversified Fund $ 10,897 $ 3,875 $ - $ 4,498 $ 44,827 Frontier Masters Fund - 8,347 - 1,750 27,984 Frontier Long/Short Commodity Fund - - - 51 5,306 Frontier Balanced Fund - 13,917 1,490 56,791 101,770 Frontier Select Fund - - - 8,575 7,812 Frontier Global Fund - 42,705 8,124 17,803 24,353 Frontier Heritage Fund - 9,201 1,238 6,684 10,189
Schedule of interest paid by each series to managing owner	The following table outlines the interest paid by each Series to the Managing Owner and its ratio to average net assets for the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 Gross Amount Paid to the Gross Amount Paid to the Ratio to Average Ratio to Average Managing Owner Managing Owner Net Assets Net Assets Frontier Diversified Fund Class 1 $ - $ - 0.00 % 0.00 % Frontier Diversified Fund Class 2 - - 0.00 % 0.00 % Frontier Diversified Fund Class 3 - - 0.00 % 0.00 % Frontier Masters Fund Class 1 - - 0.00 % 0.00 % Frontier Masters Fund Class 2 - - 0.00 % 0.00 % Frontier Masters Fund Class 3 - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2 3 37 0.00 % 0.02 % Frontier Long/Short Commodity Fund Class 3 81 488 0.00 % 0.02 % Frontier Long/Short Commodity Fund Class 1a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 3a - - 0.00 % 0.00 % Frontier Balanced Fund Class 1 1,150 14,652 0.01 % 0.05 % Frontier Balanced Fund Class 1AP 19 256 0.01 % 0.05 % Frontier Balanced Fund Class 2 232 2,656 0.01 % 0.05 % Frontier Balanced Fund Class 2a 3 39 0.00 % 0.01 % Frontier Balanced Fund Class 3a 10 108 0.00 % 0.01 % Frontier Select Fund Class 1 1,400 3,375 0.04 % 0.08 % Frontier Select Fund Class 1AP 3 15 0.05 % 0.08 % Frontier Select Fund Class 2 41 359 0.04 % 0.08 % Frontier Global Fund Class 1 3,631 34,013 0.06 % 0.32 % Frontier Global Fund Class 1AP 21 111 0.06 % 0.32 % Frontier Global Fund Class 2 252 3,251 0.06 % 0.32 % Frontier Heritage Fund Class 1 1,196 5,382 0.04 % 0.13 % Frontier Heritage Fund Class 1AP 2 5 0.05 % 0.12 % Frontier Heritage Fund Class 2 255 836 0.04 % 0.13 % Total $ 8,299 $ 65,583 Six Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 Gross Amount Paid to the Gross Amount Paid to the Ratio to Average Ratio to Average Managing Owner Managing Owner Net Assets Net Assets Frontier Diversified Fund Class 1 $ - $ - 0.00 % 0.00 % Frontier Diversified Fund Class 2 - - 0.00 % 0.00 % Frontier Diversified Fund Class 3 - - 0.00 % 0.00 % Frontier Masters Fund Class 1 - - 0.00 % 0.00 % Frontier Masters Fund Class 2 - - 0.00 % 0.00 % Frontier Masters Fund Class 3 - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2 9 37 0.01 % 0.02 % Frontier Long/Short Commodity Fund Class 3 208 488 0.01 % 0.02 % Frontier Long/Short Commodity Fund Class 1a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 2a - - 0.00 % 0.00 % Frontier Long/Short Commodity Fund Class 3a - - 0.00 % 0.00 % Frontier Balanced Fund Class 1 2,881 14,652 0.01 % 0.04 % Frontier Balanced Fund Class 1AP 45 256 0.01 % 0.05 % Frontier Balanced Fund Class 2 555 2,656 0.01 % 0.04 % Frontier Balanced Fund Class 2a 7 39 0.00 % 0.01 % Frontier Balanced Fund Class 3a 23 108 0.00 % 0.01 % Frontier Select Fund Class 1 2,259 5,835 0.06 % 0.12 % Frontier Select Fund Class 1AP 3 25 0.08 % 0.12 % Frontier Select Fund Class 2 71 724 0.06 % 0.11 % Frontier Global Fund Class 1 22,360 62,703 0.35 % 0.53 % Frontier Global Fund Class 1AP 105 194 0.32 % 0.54 % Frontier Global Fund Class 2 1,286 7,028 0.32 % 0.52 % Frontier Heritage Fund Class 1 3,424 5,382 0.12 % 0.12 % Frontier Heritage Fund Class 1AP 3 5 0.12 % 0.10 % Frontier Heritage Fund Class 2 669 836 0.11 % 0.12 % Total $ 33,908 $ 100,968

Financial Highlights (Tables)

Financial Highlights (Tables)	6 Months Ended
Financial Highlights (Tables)	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Schedule of financial highlights of trust	The following information presents the financial highlights of the Trust, with respect to the Series, for the three and six months ended June 30, 2019 and 2018. Three months ending June 30, 2019 Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, March 31, 2019 $ 100.84 $ 119.69 $ 111.62 $ 88.19 $ 104.69 $ 98.04 $ 50.14 $ 93.67 $ 58.96 $ 98.25 $ 61.96 Net operating results: Interest income 0.01 0.01 0.01 0.03 0.04 0.04 0.01 0.02 0.01 0.02 0.01 Expenses (1.69 ) (1.12 ) (1.05 ) (2.10 ) (1.68 ) (1.57 ) (0.82 ) (0.66 ) (0.41 ) (0.69 ) (0.44 ) Net gain/(loss) on investments, net of non-controlling interests 3.29 3.53 3.38 1.20 1.05 1.02 3.53 5.49 3.68 5.76 3.92 Net income/(loss) 1.60 2.42 2.34 (0.86 ) (0.59 ) (0.51 ) 2.72 4.85 3.28 5.09 3.49 Net asset value, June 30, 2019 $ 102.44 $ 122.11 $ 113.96 $ 87.33 $ 104.10 $ 97.53 $ 52.86 $ 98.52 $ 62.24 $ 103.34 $ 65.45 Ratios to average net assets Net investment income/(loss) -6.74 % -3.73 % -3.73 % -9.40 % -6.32 % -6.32 % -6.30 % -2.66 % -2.66 % -2.66 % -2.66 % Expenses before incentive fees (3)(4) 6.77 % 3.76 % 3.76 % 9.55 % 6.48 % 6.48 % 6.38 % 2.74 % 2.74 % 2.74 % 2.74 % Expenses after incentive fees (3)(4) 6.77 % 3.76 % 3.76 % 9.55 % 6.48 % 6.48 % 6.38 % 2.74 % 2.74 % 2.74 % 2.74 % Total return before incentive fees (2) 1.59 % 2.02 % 2.10 % -0.98 % -0.56 % -0.52 % 5.42 % 5.18 % 5.56 % 5.18 % 5.63 % Total return after incentive fees (2) 1.59 % 2.02 % 2.10 % -0.98 % -0.56 % -0.52 % 5.42 % 5.18 % 5.56 % 5.18 % 5.63 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2019 $ 114.89 $ 132.01 $ 178.04 $ 154.27 $ 153.78 $ 70.76 $ 82.30 $ 107.99 Net operating results: Interest income 0.06 0.07 0.09 0.08 0.08 0.00 0.00 0.00 Expenses (2.00 ) (1.30 ) (1.76 ) (1.52 ) (1.52 ) (1.00 ) (0.52 ) (0.69 ) Net gain/(loss) on investments, net of non-controlling interests 3.41 3.91 5.28 4.66 4.57 6.27 6.56 9.66 Net income/(loss) 1.47 2.68 3.62 3.22 3.13 5.27 6.04 8.97 Net asset value, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Ratios to average net assets Net investment income/(loss) -6.76 % -3.72 % -3.72 % -3.72 % -3.72 % -5.52 % -2.49 % -2.49 % Expenses before incentive fees (3)(4) 6.97 % 3.93 % 3.93 % 3.93 % 3.93 % 5.52 % 2.49 % 2.49 % Expenses after incentive fees (3)(4) 6.97 % 3.93 % 3.93 % 3.93 % 3.93 % 5.52 % 2.49 % 2.49 % Total return before incentive fees (2) 1.28 % 2.03 % 2.03 % 2.09 % 2.04 % 7.45 % 7.34 % 8.31 % Total return after incentive fees (2) 1.28 % 2.03 % 2.03 % 2.09 % 2.04 % 7.45 % 7.34 % 8.31 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2019 $ 136.33 $ 156.50 $ 195.48 $ 99.68 $ 112.44 $ 153.46 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (3.15 ) (2.42 ) (3.02 ) (1.71 ) (1.12 ) (1.46 ) Net gain/(loss) on investments, net of non-controlling interests 10.46 12.05 15.02 11.63 15.02 17.96 Net income/(loss) 7.31 9.63 12.00 9.92 13.90 16.50 Net asset value, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Ratios to average net assets Net investment income/(loss) -9.11 % -6.07 % -6.07 % -6.75 % -3.71 % -3.71 % Expenses before incentive fees (3)(4) 9.11 % 6.07 % 6.07 % 6.75 % 3.71 % 3.71 % Expenses after incentive fees (3)(4) 9.11 % 6.07 % 6.07 % 6.75 % 3.71 % 3.71 % Total return before incentive fees (2) 5.36 % 6.15 % 6.14 % 9.95 % 12.36 % 10.75 % Total return after incentive fees (2) 5.36 % 6.15 % 6.14 % 9.95 % 12.36 % 10.75 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, March 31, 2018 $ 106.53 $ 124.26 $ 115.59 $ 98.30 $ 114.67 $ 107.10 $ 77.86 $ 112.44 $ 89.95 $ 117.97 $ 94.24 Net operating results: Interest income 0.06 0.07 0.07 0.10 0.12 0.11 0.07 0.11 0.08 0.11 0.09 Expenses (1.73 ) (1.07 ) (0.99 ) (2.19 ) (1.94 ) (1.81 ) (1.23 ) (0.67 ) (0.53 ) (0.70 ) (0.56 ) Net gain/(loss) on investments, net of non-controlling interests 3.44 3.61 3.43 3.12 3.53 3.37 (5.92 ) (5.36 ) (7.37 ) (5.63 ) (7.66 ) Net income/(loss) 1.77 2.61 2.50 1.03 1.71 1.67 (7.08 ) (5.92 ) (7.82 ) (6.22 ) (8.13 ) Net asset value, June 30, 2018 $ 108.30 $ 126.87 $ 118.09 $ 99.33 $ 116.38 $ 108.77 $ 70.78 $ 106.52 $ 82.13 $ 111.75 $ 86.11 Ratios to average net assets Net investment income/(loss) -6.27 % -3.20 % -3.20 % -8.68 % -6.48 % -6.48 % -6.13 % -2.05 % -2.05 % -2.05 % -2.05 % Expenses before incentive fees (3)(4) 6.50 % 3.43 % 3.43 % 9.11 % 6.91 % 6.91 % 6.51 % 2.43 % 2.43 % 2.43 % 2.43 % Expenses after incentive fees (3)(4) 6.50 % 3.43 % 3.43 % 9.11 % 6.91 % 6.91 % 6.51 % 2.43 % 2.43 % 2.43 % 2.43 % Total return before incentive fees (2) 1.66 % 2.10 % 2.16 % 1.05 % 1.49 % 1.56 % -9.09 % -5.27 % -8.69 % -5.27 % -8.63 % Total return after incentive fees (2) 1.66 % 2.10 % 2.16 % 1.05 % 1.49 % 1.56 % -9.09 % -5.27 % -8.69 % -5.27 % -8.63 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2018 $ 124.93 $ 139.33 $ 187.88 $ 162.67 $ 162.12 $ 76.47 $ 85.36 $ 113.28 Net operating results: Interest income 0.03 0.03 0.04 0.03 0.03 0.00 0.00 0.00 Expenses (2.08 ) (1.29 ) (1.74 ) (1.51 ) (1.50 ) (0.98 ) (0.48 ) (0.63 ) Net gain/(loss) on investments, net of non-controlling interests 2.33 2.61 3.54 3.14 3.12 (0.74 ) (0.81 ) (1.09 ) Net income/(loss) 0.28 1.35 1.84 1.66 1.65 (1.72 ) (1.29 ) (1.72 ) Net asset value, June 30, 2018 $ 125.21 $ 140.68 $ 189.72 $ 164.33 $ 163.77 $ 74.75 $ 84.07 $ 111.56 Ratios to average net assets Net investment income/(loss) -6.64 % -3.64 % -3.64 % -3.64 % -3.64 % -5.28 % -2.28 % -2.28 % Expenses before incentive fees (3)(4) 6.73 % 3.73 % 3.73 % 3.73 % 3.73 % 5.28 % 2.28 % 2.28 % Expenses after incentive fees (3)(4) 6.73 % 3.73 % 3.73 % 3.73 % 3.73 % 5.28 % 2.28 % 2.28 % Total return before incentive fees (2) 0.22 % 0.97 % 0.98 % 1.02 % 1.02 % -2.25 % -1.51 % -1.52 % Total return after incentive fees (2) 0.22 % 0.97 % 0.98 % 1.02 % 1.02 % -2.25 % -1.51 % -1.52 % Frontier Winton Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, March 31, 2018 $ 144.60 $ 161.61 $ 196.85 $ 104.50 $ 116.64 $ 156.11 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (3.72 ) (2.95 ) (3.59 ) (2.27 ) (1.68 ) (2.25 ) Net gain/(loss) on investments, net of non-controlling interests 7.78 8.53 10.21 0.45 0.50 0.68 Net income/(loss) 4.06 5.58 6.62 (1.82 ) (1.18 ) (1.57 ) Net asset value, June 30, 2018 $ 148.66 $ 167.19 $ 203.47 $ 102.68 $ 115.46 $ 154.54 Ratios to average net assets Net investment income/(loss) -10.21 % -7.20 % -7.20 % -8.87 % -5.87 % -5.87 % Expenses before incentive fees (3)(4) -10.21 % 7.20 % 7.20 % 8.87 % 5.87 % 5.87 % Expenses after incentive fees (3)(4) -10.21 % 7.20 % 7.20 % 8.87 % 5.87 % 5.87 % Total return before incentive fees (2) 2.81 % 3.45 % 3.36 % -1.74 % -1.01 % -1.01 % Total return after incentive fees (2) 2.81 % 3.45 % 3.36 % -1.74 % -1.01 % -1.01 % Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2018 $ 102.25 $ 120.84 $ 112.62 $ 91.10 $ 107.68 $ 100.77 $ 56.80 $ 98.82 $ 66.52 $ 103.66 $ 69.83 Net operating results: Interest income 0.04 0.05 0.05 0.04 0.05 0.05 0.03 0.05 0.03 0.05 0.03 Expenses (3.32 ) (2.16 ) (2.02 ) (3.59 ) (3.12 ) (2.92 ) (1.59 ) (1.25 ) (0.78 ) (1.31 ) (0.83 ) Net gain/(loss) on investments, net of non-controlling interests 3.47 3.38 3.31 (0.22 ) (0.51 ) (0.37 ) (2.38 ) 0.90 (3.53 ) 0.94 (3.59 ) Net income/(loss) 0.19 1.27 1.34 (3.77 ) (3.58 ) (3.24 ) (3.94 ) (0.30 ) (4.28 ) (0.32 ) (4.38 ) Net asset value, June 30, 2019 $ 102.44 $ 122.11 $ 113.96 $ 87.33 $ 104.10 $ 97.53 $ 52.86 $ 98.52 $ 62.24 $ 103.34 $ 65.45 Ratios to average net assets Net investment income/(loss) -13.31 % -7.23 % -7.23 % -16.90 % -12.15 % -12.15 % -12.58 % -5.12 % -5.12 % -5.12 % -5.12 % Expenses before incentive fees (3)(4) 13.49 % 7.40 % 7.40 % 17.10 % 12.35 % 12.35 % 12.80 % 5.34 % 5.34 % 5.34 % 5.34 % Expenses after incentive fees (3)(4) 13.49 % 7.40 % 7.40 % 17.10 % 12.35 % 12.35 % 12.80 % 5.34 % 5.34 % 5.34 % 5.34 % Total return before incentive fees (2) 0.19 % 1.05 % 1.19 % -4.14 % -3.32 % -3.22 % -6.94 % -0.30 % -6.43 % -0.31 % -6.27 % Total return after incentive fees (2) 0.19 % 1.05 % 1.19 % -4.14 % -3.32 % -3.22 % -6.94 % -0.30 % -6.43 % -0.31 % -6.27 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Net operating results: Interest income 0.10 0.12 0.16 0.14 0.14 0.00 0.00 0.00 Expenses (3.96 ) (2.60 ) (3.50 ) (3.04 ) (3.03 ) (1.92 ) (1.04 ) (1.33 ) Net gain/(loss) on investments, net of non-controlling interests 2.59 3.01 4.06 3.58 3.54 6.54 6.90 10.11 Net income/(loss) (1.27 ) 0.53 0.72 0.68 0.65 4.62 5.86 8.78 Net asset value, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Ratios to average net assets Net investment income/(loss) -13.67 % -7.63 % -7.63 % -7.63 % -7.63 % -11.10 % -5.06 % -5.06 % Expenses before incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Expenses after incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Total return before incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Total return after incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (5.21 ) (3.73 ) (4.65 ) (3.24 ) (2.16 ) (2.75 ) Net gain/(loss) on investments, net of non-controlling interests 17.28 19.94 24.96 13.01 16.72 20.18 Net income/(loss) 12.07 16.21 20.31 9.77 14.56 17.43 Net asset value, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Ratios to average net assets Net investment income/(loss) -15.82 % -9.78 % -9.78 % -13.39 % -7.34 % -7.34 % Expenses before incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Expenses after incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Total return before incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % Total return after incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Net operating results: Interest income 0.10 0.12 0.16 0.14 0.14 0.00 0.00 0.00 Expenses (3.96 ) (2.60 ) (3.50 ) (3.04 ) (3.03 ) (1.92 ) (1.04 ) (1.33 ) Net gain/(loss) on investments, net of non-controlling interests 2.59 3.01 4.06 3.58 3.54 6.54 6.90 10.11 Net income/(loss) (1.27 ) 0.53 0.72 0.68 0.65 4.62 5.86 8.78 Net asset value, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Ratios to average net assets Net investment income/(loss) -13.67 % -7.63 % -7.63 % -7.63 % -7.63 % -11.10 % -5.06 % -5.06 % Expenses before incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Expenses after incentive fees (3)(4) 14.04 % 8.00 % 8.00 % 8.00 % 8.00 % 11.10 % 5.06 % 5.06 % Total return before incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Total return after incentive fees (2) -1.08 % 0.40 % 0.40 % 0.43 % 0.42 % 6.47 % 7.10 % 8.12 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (5.21 ) (3.73 ) (4.65 ) (3.24 ) (2.16 ) (2.75 ) Net gain/(loss) on investments, net of non-controlling interests 17.28 19.94 24.96 13.01 16.72 20.18 Net income/(loss) 12.07 16.21 20.31 9.77 14.56 17.43 Net asset value, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Ratios to average net assets Net investment income/(loss) -15.82 % -9.78 % -9.78 % -13.39 % -7.34 % -7.34 % Expenses before incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Expenses after incentive fees (3)(4) 15.82 % 9.78 % 9.78 % 13.39 % 7.34 % 7.34 % Total return before incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % Total return after incentive fees (2) 9.17 % 10.81 % 10.85 % 9.79 % 13.03 % 11.43 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2017 $ 116.41 $ 135.19 $ 125.68 $ 114.74 $ 133.27 $ 124.40 $ 81.35 $ 115.81 $ 93.59 $ 121.50 $ 97.99 Net operating results: Interest income 0.10 0.12 0.11 0.19 0.22 0.20 0.16 0.22 0.18 0.23 0.19 Expenses (3.56 ) (2.23 ) (2.07 ) (4.47 ) (3.94 ) (3.66 ) (2.42 ) (1.36 ) (1.10 ) (1.42 ) (1.15 ) Net gain/(loss) on investments, net of non-controlling interests (4.65 ) (6.21 ) (5.63 ) (11.13 ) (13.17 ) (12.17 ) (8.31 ) (8.15 ) (10.54 ) (8.56 ) (10.92 ) Net income/(loss) (8.11 ) (8.32 ) (7.59 ) (15.41 ) (16.89 ) (15.63 ) (10.57 ) (9.29 ) (11.46 ) (9.75 ) (11.88 ) Net asset value, June 30, 2018 $ 108.30 $ 126.87 $ 118.09 $ 99.33 $ 116.38 $ 108.77 $ 70.78 $ 106.52 $ 82.13 $ 111.75 $ 86.11 Ratios to average net assets Net investment income/(loss) -6.37 % -3.33 % -3.33 % -8.50 % -6.26 % -6.26 % -5.67 % -2.02 % -2.02 % -2.02 % -2.02 % Expenses before incentive fees (3)(4) 6.55 % 3.51 % 3.51 % 8.87 % 6.63 % 6.63 % 6.06 % 2.41 % 2.41 % 2.41 % 2.41 % Expenses after incentive fees (3)(4) 6.56 % 3.52 % 3.52 % 8.87 % 6.63 % 6.63 % 6.06 % 2.41 % 2.41 % 2.41 % 2.41 % Total return before incentive fees (2) -6.96 % -6.14 % -6.03 % -13.43 % -12.67 % -12.56 % -12.99 % -8.02 % -12.24 % -8.02 % -12.12 % Total return after incentive fees (2) -6.97 % -6.15 % -6.04 % -13.43 % -12.67 % -12.56 % -12.99 % -8.02 % -12.24 % -8.02 % -12.12 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2017 $ 135.96 $ 150.56 $ 202.90 $ 175.77 $ 175.18 $ 90.27 $ 100.02 $ 132.73 Net operating results: Interest income 0.08 0.08 0.11 0.10 0.10 0.00 0.00 0.00 Expenses (4.67 ) (3.10 ) (4.18 ) (3.63 ) (3.62 ) (2.13 ) (1.05 ) (1.42 ) Net gain/(loss) on investments, net of non-controlling interests (6.16 ) (6.86 ) (9.11 ) (7.91 ) (7.89 ) (13.39 ) (14.90 ) (19.75 ) Net income/(loss) (10.75 ) (9.88 ) (13.18 ) (11.44 ) (11.41 ) (15.52 ) (15.95 ) (21.17 ) Net asset value, June 30, 2018 $ 125.21 $ 140.68 $ 189.72 $ 164.33 $ 163.77 $ 74.75 $ 84.07 $ 111.56 Ratios to average net assets Net investment income/(loss) -6.94 % -3.95 % -3.95 % -3.95 % -3.95 % -5.38 % -2.38 % -2.38 % Expenses before incentive fees (3)(4) 6.72 % 3.72 % 3.72 % 3.72 % 3.72 % 5.38 % 2.38 % 2.38 % Expenses after incentive fees (3)(4) 7.06 % 4.07 % 4.07 % 4.07 % 4.07 % 5.38 % 2.38 % 2.38 % Total return before incentive fees (2) -7.56 % -6.22 % -6.15 % -6.16 % -6.17 % -17.19 % -15.95 % -15.95 % Total return after incentive fees (2) -7.91 % -6.56 % -6.50 % -6.51 % -6.51 % -17.19 % -15.95 % -15.95 % Frontier Global Fund (formerly Frontier Winton Fund) Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2017 $ 159.08 $ 176.44 $ 216.50 $ 121.19 $ 134.28 $ 179.70 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (7.15 ) (5.46 ) (6.87 ) (4.74 ) (3.48 ) (4.63 ) Net gain/(loss) on investments, net of non-controlling interests (3.27 ) (3.79 ) (6.16 ) (13.77 ) (15.34 ) (20.53 ) Net income/(loss) (10.42 ) (9.25 ) (13.03 ) (18.51 ) (18.82 ) (25.16 ) Net asset value, June 30, 2018 $ 148.66 $ 167.19 $ 203.47 $ 102.68 $ 115.46 $ 154.54 Ratios to average net assets Net investment income/(loss) -9.53 % -6.53 % -6.53 % -8.69 % -5.69 % -5.69 % Expenses before incentive fees (3)(4) 9.53 % 6.53 % 6.53 % 8.66 % 5.67 % 5.67 % Expenses after incentive fees (3)(4) 9.53 % 6.53 % 6.53 % 8.69 % 5.69 % 5.69 % Total return before incentive fees (2) -6.55 % -5.24 % -6.02 % -15.25 % -13.99 % -13.97 % Total return after incentive fees (2) -6.55 % -5.24 % -6.02 % -15.27 % -14.02 % -14.00 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.
Frontier Funds [Member]
Schedule of financial highlights of trust	The following information presents the financial highlights of the Trust for the six months ended June 30, 2019 and 2018. This data has been derived from the information presented in the consolidated financial statements. 2019 2018 Ratios to average net assets (1) Net investment income/(loss) (1) -11.15 % -5.90 % Expenses before incentive fees (3) (4) 11.54 % 6.14 % Expenses after incentive fees (3) (4) 11.54 % 6.14 % Total return before incentive fees (2) 1.04 % 0.49 % Total return after incentive fees (2) 1.04 % 0.49 % (1) Annualized with the exception of incentive fees. (2) Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5. (4) Does not include management and incentive fees at Galaxy Plus.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
Derivative Instruments and Hedging Activities (Tables)	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Schedule of averages futures contracts	The following tables summarize the monthly averages of forwards, options and futures contracts bought and sold for each respective Series of the Trust: For the Three Months ended June 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 228 275 For the Three Months Ended June 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 174 301 For the Six Months ended June 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 480 581 For the Six Months Ended June 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 1,522 1,518
Schedule of realized trading revenue from futures, forwards and options	The following tables summarize the trading revenues for the three and six months ended June 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ 64,042 Currencies (123,270 ) Energies (7,996 ) Interest rates 312,541 Metals 13,674 Stock indices (5,618 ) Realized trading income/(loss) (1) $ 253,372 Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ 18,952 Currencies (241,334 ) Energies (37,678 ) Interest rates 548,174 Metals 8,700 Stock indices (38,915 ) Realized trading income/(loss) (1) $ 257,898 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ (46,019 ) Currencies (222,765 ) Energies 19,021 Agriculturals 22,712 Interest rates (10,368 ) Stock indices (20,242 ) Realized trading income/(loss) (1) $ (257,661 ) Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ (105,544 ) Currencies (199,028 ) Energies 61,256 Agriculturals 50,782 Interest rates (97,212 ) Stock indices 6,410 Realized trading income/(loss) (1) $ (283,336 ) (1) Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures, forwards, and options. Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ (17,348 ) Currencies 16,367 Energies (7,260 ) Interest rates (99,664 ) Metals 4,519 Stock indices 9,106 Change in unrealized trading income/(loss) (1) $ (94,279 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Frontier Balanced Fund Agriculturals $ (41,639 ) Currencies (57,496 ) Energies 1,510 Interest rates (107,355 ) Metals 6,931 Stock indices 1,534 Change in unrealized trading income/(loss) (1) $ (196,516 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ 9,429 Currencies (61,638 ) Energies (5,285 ) Agriculturals (84,319 ) Interest rates (36,616 ) Stock indices (9,498 ) Change in unrealized trading income/(loss) (1) $ (187,927 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Frontier Balanced Fund Metals $ 23,123 Currencies (101,409 ) Energies (51,468 ) Agriculturals (43,085 ) Interest rates 112,053 Stock indices (16,876 ) Change in unrealized trading income/(loss) (1) (77,662 ) (1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit).
Schedule for off setting of derivative assets and liabilities	The following tables present gross and net information about the Series’ assets and liabilities subject to master netting arrangements as disclosed on the statements of financial condition as of June 30, 2019 and December 31, 2018. As of June 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 242,957 $ (201,096 ) $ 41,861 Swap Contracts 10,691,012 - $ 10,691,012 Frontier Diversified Fund Swap Contracts $ 5,881,358 $ - $ 5,881,358 Frontier Long/Short Commodity Fund Swap Contracts $ 435,901 $ - $ 435,901 Frontier Heritage Fund Swap Contracts $ 3,036,673 $ - $ 3,036,673 As of December 31, 2018 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 348,879 $ (128,220 ) $ 220,659 Swap Contracts 10,794,908 - $ 10,794,908 Frontier Diversified Fund Swap Contracts $ 5,920,414 $ - $ 5,920,414 Frontier Long/Short Commodity Fund Swap Contracts $ 479,102 $ - $ 479,102 Frontier Heritage Fund Swap Contracts $ 2,955,444 $ - $ 2,955,444
Frontier Funds [Member]
Schedule of realized trading revenue from futures, forwards and options	The following tables summarize the trading revenues for the three and six months ended June 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Agriculturals $ 64,042 Currencies (190,296 ) Energies (7,996 ) Interest rates 312,541 Metals 5,826 Stock indices (5,618 ) Realized trading income/(loss) (1) $ 178,497 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Metals $ 110,822 Currencies (735,456 ) Energies 1,237,113 Agriculturals 154,718 Interest rates 132,403 Stock indices (183,740 ) Realized trading income/(loss) (1) $ 715,860 Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Agriculturals $ 4,479 Currencies (690,957 ) Energies (592,892 ) Interest rates 865,211 Metals (611,514 ) Stock indices (73,178 ) Realized trading income/(loss) (1) $ (1,098,852 ) Realized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Metals $ 286,692 Currencies (1,063,187 ) Energies 972,529 Agriculturals (9,340 ) Interest rates (46,591 ) Stock indices (178,994 ) Realized trading income/(loss) (1) $ (38,891 ) (1) Amounts recorded in the Consolidated Statements of Operations under Net realized gain(loss) on futures forwards and options. Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended June 30, 2018 Type of contract Metals $ 206,966 Currencies (9,676 ) Energies (90,184 ) Agriculturals (21,184 ) Interest rates 72,443 Stock indices 91,312 Change in unrealized trading income/(loss) (1) $ (249,677 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Six Months Ended June 30, 2018 Type of contract Metals $ (382,688 ) Currencies (278,092 ) Energies (61,956 ) Agriculturals 21,007 Interest rates 384,926 Stock indices (197,437 ) Change in unrealized trading income/(loss) (1) $ (514,240 ) (1) Amounts recorded in the Consolidated Statements of Operations under Net change in open trade equity/(deficit)
Schedule of net trading gain loss	Net Change in Open Trading Equity from Futures, Forwards and Options for the Three Months Ended June 30, 2019 Type of contract Agriculturals $ (17,348 ) Currencies 83,394 Energies 589 Interest rates (99,664 ) Metals 4,519 Stock indices 9,106 Change in unrealized trading income/(loss) (1) $ (19,404 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Six Months Ended June 30, 2019 Type of contract Agriculturals $ (96,927 ) Currencies 170,634 Energies 221,638 Interest rates (334,017 ) Metals 488,974 Stock indices 55,845 Change in unrealized trading income/(loss) (1) $ 506,148
Schedule for off setting of derivative assets and liabilities	The following tables present gross and net information about the Trust’s assets and liabilities subject the master netting arrangements as disclosed on the consolidated statements of financial condition as of June 30, 2019 and December 31, 2018: As of June 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented Open Trade Equity/(Deficit) $ 242,957 $ (201,096 ) $ 41,861 Swap Contracts 20,044,944 - 20,044,944 As of December 31, 2018 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented Open Trade Equity/(Deficit) $ 3,244,057 $ (3,642,246 ) $ (398,189 ) Swap Contracts 20,149,868 - 20,149,868

Organization and Purpose (The S

Organization and Purpose (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member]	6 Months Ended
	Jun. 30, 2019
Organization and Purpose (Textual)
Managing owner contributions to the series of the trust percentage	1.00%
Aggregate initial and ongoing service fees	9.00%
Aggregate underwriting compensation percentage	10.00%
Minimum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	30.00%
Maximum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	70.00%
Class 1 or Class 1a [Member]
Organization and Purpose (Textual)
Amortized monthly annual rate percentage	2.00%
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Percentage of average daily NAV charged as a service fees	3.00%
Percentage of NAV charged as a service fees	3.00%
Class 2 or Class 2a [Member]
Organization and Purpose (Textual)
Service fee percentage	0.50%
Percentage of NAV charged as a service fees	0.25%

Organization and Purpose (Front

Organization and Purpose (Frontier Funds) (Details) - Frontier Fund [Member]	6 Months Ended
	Jun. 30, 2019
Organization and Purpose (Textual)
Managing owner contributions to the series of the trust percentage	1.00%
Aggregate initial and ongoing service fees	9.00%
Delaware statutory trust expire date	Dec. 31, 2053
Aggregate underwriting compensation percentage	10.00%
Percentage of average daily NAV charged as a service fees	2.00%
Percentage of NAV charged as a service fees	3.00%
Minimum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	30.00%
Maximum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	70.00%
Class 1 or Class 1a [Member]
Organization and Purpose (Textual)
Service fee percentage	3.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 2 and Class 2a [Member]
Organization and Purpose (Textual)
Service fee percentage	0.50%
Service fee charged to limited owners	0.25%

Significant Accounting Polici_3

Significant Accounting Policies (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Aggregate interest income percentage	2.00%
Restricted cash	$ 2,969,013	$ 1,717,065
Gross income of the Trust constitutes qualifying income	90.00%
Incentive fees percentage	10.00%
Incentive fee, description	The incentive fee exceeds 10% of new net profits during the period for a particular series, then the Managing Owner is obligated to return any amount in excess to the Series.
Frontier Diversified Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	$ 23,105	20,430
Frontier Masters Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	31,765	28,100
Frontier Long/Short Commodity Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	136
Frontier Balanced Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	296,547	258,194
Frontier Select Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	14,233	11,162
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Significant Accounting Policies (Textual)
Advance for service fee	145,067	133,281
Frontier Heritage Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	$ 53,155	$ 46,159
Class 1 or Class 1a [Member]
Significant Accounting Policies (Textual)
Amortized monthly annual rate percentage	2.00%
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Percentage of average daily NAV charged as a service fees	3.00%
Percentage of NAV charged as a service fees	3.00%
Class 2 or Class 2a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	0.50%
Percentage of NAV charged as a service fees	0.25%
Class 1AP, Class 2a and Class 3a [Member]
Significant Accounting Policies (Textual)
Aggregate interest income percentage	100.00%

Significant Accounting Polici_4

Significant Accounting Policies (Frontier Funds) (Details) - Frontier Fund [Member] - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Incentive fee, description	If the Managing Owner’s share of the incentive fee exceeds 10% of new net profits during the period, then the Managing Owner is obligated to return any amount in excess.
Subscriptions in advance	$ 564,008	$ 497,326
Class 1AP, Class 2a and Class 3a [Member]
Significant Accounting Policies (Textual)
Aggregate interest income from all sources, including assets held at clearing brokers is paid to the Managing Owner	100.00%
Class 2 and Class 2a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	0.50%
Service fee charged to limited owners	0.25%
Class 1 or Class 1a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] \| Frontier Diversified Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] \| Frontier Masters Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] \| Frontier Long/Short Commodity Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] \| Frontier Balanced Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%
Class 1 or Class 1a [Member] \| Frontier Heritage Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%
Class 1 or Class 1a [Member] \| Frontier Select Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%
Class 1 or Class 1a [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%
Frontier Trading Company I LLC [Member]
Significant Accounting Policies (Textual)
Restricted cash	$ 2,609,013	1,717,065
Frontier Trading Company II LLC [Member]
Significant Accounting Policies (Textual)
Restricted cash	$ 0	$ 4,621,100

Fair Value Measurements (The Se

Fair Value Measurements (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Swap Contracts	$ 5,881,358	$ 5,920,414
U.S. Treasury Securities	191,059	1,553,261
Frontier Diversified Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	18,043	1,160,910
Swap Contracts	5,881,358	5,920,414
U.S. Treasury Securities	191,059	1,553,261
Frontier Diversified Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	18,043	1,157,971
Swap Contracts
U.S. Treasury Securities	191,059	1,553,261
Frontier Diversified Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		2,939
Swap Contracts
U.S. Treasury Securities
Frontier Diversified Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	5,881,358	5,920,414
U.S. Treasury Securities
Frontier Masters Fund [Member]
Swap Contracts
U.S. Treasury Securities	386,444	152,384
Frontier Masters Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	36,495	775,088
U.S. Treasury Securities	386,444	152,384
Frontier Masters Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	36,495	772,732
U.S. Treasury Securities	386,444	152,384
Frontier Masters Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		2,356
U.S. Treasury Securities
Frontier Masters Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member]
Swap Contracts	435,901	479,102
U.S. Treasury Securities	135,126	202,415
Frontier Long/Short Commodity Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	12,761	28,163
Swap Contracts	435,901	479,102
U.S. Treasury Securities	135,126	202,415
Frontier Long/Short Commodity Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	12,761	28,163
Swap Contracts
U.S. Treasury Securities	135,126	202,415
Frontier Long/Short Commodity Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies
Open Trade Equity (Deficit)
Swap Contracts
Investments in Private Investment Companies
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	435,901	479,102
U.S. Treasury Securities
Frontier Balanced Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	6,230	1,744,999
Open Trade Equity (Deficit)	42,147	220,659
Swap Contracts	10,691,012	10,794,908
U.S. Treasury Securities	65,967	123,409
Frontier Balanced Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	6,230	1,739,609
Open Trade Equity (Deficit)	103,838	242,860
Swap Contracts
U.S. Treasury Securities	65,967	123,409
Frontier Balanced Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		5,390
Open Trade Equity (Deficit)	(61,691)	(22,201)
Swap Contracts
U.S. Treasury Securities
Frontier Balanced Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Open Trade Equity (Deficit)
Swap Contracts	10,691,012	10,794,908
U.S. Treasury Securities
Frontier Select Fund [Member]
Swap Contracts
U.S. Treasury Securities	389,753	82,386
Frontier Select Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	587,909	523,180
U.S. Treasury Securities	389,753	82,386
Frontier Select Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	36,809	11,462
U.S. Treasury Securities	389,753	82,386
Frontier Select Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Select Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies	551,100	511,718
U.S. Treasury Securities
Frontier Global Fund [Member]
Swap Contracts
U.S. Treasury Securities	194,665	3,126,551
Frontier Global Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	18,384
U.S. Treasury Securities	194,665
Frontier Global Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	18,384
U.S. Treasury Securities	194,665
Frontier Global Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Global Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Winton Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies		4,292,075
U.S. Treasury Securities		3,126,551
Frontier Winton Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies		4,280,023
U.S. Treasury Securities		3,126,551
Frontier Winton Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		12,052
U.S. Treasury Securities
Frontier Winton Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Heritage Fund [Member]
Swap Contracts	3,036,673	2,955,444
U.S. Treasury Securities	256,696	443,921
Frontier Heritage Fund [Member] \| Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	24,242	726,686
Swap Contracts	3,036,673	2,955,444
U.S. Treasury Securities	256,696	443,921
Frontier Heritage Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	24,242	724,614
Swap Contracts
U.S. Treasury Securities	256,696	443,921
Frontier Heritage Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		2,072
Swap Contracts
U.S. Treasury Securities
Frontier Heritage Fund [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	3,036,673	2,955,444
U.S. Treasury Securities

Fair Value Measurements (The _2

Fair Value Measurements (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Frontier Balanced Fund [Member] \| Level 3 Inputs [Member] \| Swap [Member]
Beginning, Balance of recurring Level 3 assets			$ 10,794,908	$ 11,340,959	$ 11,340,959
Included in earnings-realized
Included in earnings-unrealized			(103,896)		1,453,948
Proceeds from collateral reduction					(1,999,999)
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 10,691,012		10,691,012		10,794,908
Frontier Long/Short Commodity Fund [Member]
Total gains or losses (realized/unrealized):	469	$ 1,870	1,029	1,812
Frontier Long/Short Commodity Fund [Member] \| Level 3 Inputs [Member] \| Swap [Member]
Beginning, Balance of recurring Level 3 assets			479,102	397,039	397,039
Included in earnings-realized
Included in earnings-unrealized			(43,201)		82,063
Proceeds from collateral reduction
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	435,901		435,901		479,102
Frontier Diversified Fund [Member]
Total gains or losses (realized/unrealized):	1,115	(154,045)	85,613	(4,402)
Frontier Diversified Fund [Member] \| Level 3 Inputs [Member] \| Swap [Member]
Beginning, Balance of recurring Level 3 assets			5,920,414	6,376,472	6,376,472
Included in earnings-realized
Included in earnings-unrealized			(39,055)		643,941
Proceeds from collateral reduction					(1,099,999)
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	5,881,359		5,881,359		5,920,414
Frontier Heritage Fund [Member]
Total gains or losses (realized/unrealized):	6,966	(125,470)	63,918	(1,968)
Frontier Heritage Fund [Member] \| Level 3 Inputs [Member] \| Swap [Member]
Beginning, Balance of recurring Level 3 assets			2,955,444	3,094,367	3,094,367
Included in earnings-realized
Included in earnings-unrealized			81,229		(138,923)
Proceeds from collateral reduction
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	3,036,673		3,036,673		2,955,444
Frontier Select Fund [Member]
Total gains or losses (realized/unrealized):	(63,183)	$ 42,595	(37,710)	37,017
Frontier Select Fund [Member] \| Level 3 Inputs [Member] \| Investment in Unconsolidated Trading Companies [Member]
Beginning, Balance of recurring Level 3 assets			511,718	$ 579,073	579,073
Change in fair value of investments in unconsolidated trading companies			39,383		(67,355)
Purchases of investments of unconsolidated trading companies
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 551,101		$ 551,101		$ 511,718

Fair Value Measurements (The _3

Fair Value Measurements (The Series of the Frontier Funds) (Details 2) - Swap Contracts [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
The Series of the Frontier Funds [Member] \| Frontier Diversified Fund [Member]
Total change in unrealized appreciation (depreciation)	$ (39,055)	$ 643,941
The Series of the Frontier Funds [Member] \| Frontier Long/Short Commodity Fund [Member]
Total change in unrealized appreciation (depreciation)	(43,201)	82,063
The Series of the Frontier Funds [Member] \| Frontier Balanced Fund [Member]
Total change in unrealized appreciation (depreciation)	(103,896)	1,453,948
The Series of the Frontier Funds [Member] \| Frontier Heritage Fund [Member]
Total change in unrealized appreciation (depreciation)	81,229	(138,923)
Investments in Unconsolidated Trading Companies [Member] \| Frontier Select Fund [Member]
Total change in unrealized appreciation (depreciation)	$ 37,710	$ (67,355)

Fair Value Measurements (Fronti

Fair Value Measurements (Frontier Funds) (Details) - Fair Value, Measurements, Recurring [Member] - Frontier Funds [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Open Trade Equity (Deficit)	$ 42,147	$ (398,189)
Swap Contracts	20,044,944	20,149,868
U.S. Treasury Securities	1,619,710	5,684,327
Level 1 Inputs [Member]
Open Trade Equity (Deficit)	103,838	(400,796)
Swap Contracts
U.S. Treasury Securities	1,619,710	5,684,327
Level 2 Inputs [Member]
Open Trade Equity (Deficit)	(61,691)	2,607
Swap Contracts
U.S. Treasury Securities
Level 3 Inputs [Member]
Open Trade Equity (Deficit)
Swap Contracts	20,044,944	20,149,868
U.S. Treasury Securities

Fair Value Measurements (Fron_2

Fair Value Measurements (Frontier Funds) (Details 1) - Level 3 Inputs [Member] - Frontier Funds [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Beginning, Balance of recurring Level 3 assets	$ 20,149,868	$ 21,208,838
Included in earnings-realized
Included in earnings-unrealized	(104,923)	2,041,028
Proceeds from collateral reduction		(3,099,998)
Purchase of investments
Sale of investments
Transfers in and/or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 20,044,945	$ 20,149,868

Fair Value Measurements (Fron_3

Fair Value Measurements (Frontier Funds) (Details 2) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Swap [Member] \| Frontier Funds [Member]
Total change in unrealized appreciation (depreciation)	$ (104,924)	$ 2,041,028

Swap Contracts (The Series of t

Swap Contracts (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - Swap [Member] - DeutscheBank AG [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Notional Amount	$ 1,761,834	$ 1,761,834
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 5,747,765	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(39,056)	643,941
Fair Value	5,833,765	5,920,414
Advance on swap appreciation	(4,000,000)	(4,000,000)
Frontier Long/Short Commodity Fund [Member]
Notional Amount	$ 653,610	$ 653,610
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 29,950	$ 29,950
Swap Value	$ 431,716	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(43,201)	82,063
Fair Value	461,666	479,102
Advance on swap appreciation	(115,000)	(115,000)
Frontier Heritage Fund [Member]
Notional Amount	$ 2,072,056	$ 2,072,056
Termination Date	Mar. 27, 2023	Mar. 27, 2023
Cash Collateral	$ 975,450	$ 978,950
Swap Value	$ 1,929,799	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	81,229	(138,924)
Fair Value	2,905,249	2,955,444
Advance on swap appreciation	(1,900,000)	(1,900,000)
Frontier Balanced Fund [Member]
Notional Amount	$ 7,420,403	$ 7,420,403
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 10,605,012	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(103,896)	1,453,948
Fair Value	10,691,012	10,794,908
Advance on swap appreciation	$ (6,176,555)	$ (6,176,555)

Swap Contracts (The Series of_2

Swap Contracts (The Series of the Frontier Funds) (Details Textual) - The Series of the Frontier Funds [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Swap Contracts (The Series of the Frontier Funds) (Textual)
Percentage of trust's assets were deposited with over-the-counter counterparties	1.80%	1.60%
Cash holding shall be in excess amount	$ 250,000
Percentage of index exposure total	40.00%
Frontier Balanced Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	$ 6,176,555
Frontier Diversified Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	4,000,000	$ 4,000,000
Frontier Long/Short Commodity Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	115,000	115,000
Frontier Heritage Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	$ 1,900,000	$ 1,900,000

Swaps Contracts (Frontier Funds

Swaps Contracts (Frontier Funds) (Details) - Frontier Funds [Member] - DeutscheBank AG [Member] - Swap [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
XXXIV Balanced Select Swap [Member]
Counterparty
Notional Amount	$ 7,420,403	$ 7,420,403
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 10,605,012	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(103,896)	1,453,948
Fair Value	10,691,012	10,794,908
Advance on swap appreciation	(6,176,555)	(6,176,555)
XXXV Diversified Select Swap [Member]
Counterparty
Notional Amount	$ 1,761,834	$ 1,761,834
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 5,747,765	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(39,056)	643,941
Fair Value	5,833,765	5,920,414
Advance on swap appreciation	(4,000,000)	(4,000,000)
XXXVII L/S Select Swap [Member]
Counterparty
Notional Amount	$ 653,610	$ 653,610
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 29,950	$ 29,950
Swap Value	$ 431,716	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(43,201)	82,063
Fair Value	461,666	479,102
Advance on swap appreciation	(115,000)	(115,000)
Brevan Howard [Member]
Counterparty
Notional Amount	$ 2,072,056	$ 2,072,056
Termination Date	Mar. 27, 2023	Mar. 27, 2023
Cash Collateral	$ 975,450	$ 978,950
Swap Value	$ 1,929,799	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	81,229	(138,924)
Fair Value	2,905,249	2,955,444
Advance on swap appreciation	$ (1,900,000)	$ (1,900,000)

Swaps Contracts (Frontier Fun_2

Swaps Contracts (Frontier Funds) (Details Textual)	6 Months Ended	12 Months Ended
Swaps Contracts (Frontier Funds) (Details Textual)	Jun. 30, 2019	Dec. 31, 2018
Frontier Funds [Member]
Description of deposits assets	2.06% or $1,177,400	1.46% or $1,180,900

Investments in Unconsolidated_2

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Fair Value	$ 18,043	$ 1,160,910
Frontier Diversified Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.14%	7.19%
Fair Value	$ 18,043	$ 1,160,910
Frontier Masters Fund [Member]
Fair Value	$ 36,495	$ 775,088
Frontier Masters Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	1.03%	13.91%
Fair Value	$ 36,495	$ 775,088
Frontier Long/Short Commodity Fund [Member]
Fair Value	$ 12,761	$ 28,163
Frontier Long/Short Commodity Fund [Member] \| Frontier Trading Company XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.60%	1.15%
Fair Value	$ 12,761	$ 28,163
Frontier Balanced Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.03%	5.48%
Fair Value	$ 6,230	$ 1,744,999
Frontier Select Fund [Member]
Fair Value	$ 587,909	$ 523,180
Frontier Select Fund [Member] \| Frontier Trading Companies XXXVIII and XXXIX [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	15.96%	13.56%
Fair Value	$ 587,909	$ 523,180
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Fair Value	$ 18,384	$ 4,292,075
Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.30%	52.30%
Fair Value	$ 18,384	$ 4,292,075
Frontier Heritage Fund [Member]
Fair Value	$ 24,242	$ 726,686
Frontier Heritage Fund [Member] \| Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.60%	16.27%
Fair Value	$ 24,242	$ 726,686

Investments in Unconsolidated_3

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Frontier Balanced Fund [Member]
Trading Commissions	$ (174,485)	$ (312,764)	$ (360,283)	$ (627,713)
Realized Gain/(Loss)	(1,375,164)	(60,632)	1,078,230	(2,774,078)
Change in Unrealized Gain/(Loss)	2,097,671	1,467,490	(151,975)	248,402
Net Income (Loss)	548,022	1,094,094	565,972	(3,153,389)
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions	(99,335)		(153,661)
Realized Gain/(Loss)	940,770		1,206,683
Change in Unrealized Gain/(Loss)	(365,499)		(217,242)
Net Income (Loss)	475,936		835,780
Frontier Select Fund [Member]
Trading Commissions	(38,553)	(53,316)	(78,339)	(141,795)
Realized Gain/(Loss)	502,795	10,885	482,430	(619,702)
Change in Unrealized Gain/(Loss)	(149,166)	(21,306)	(82,670)	30,745
Net Income (Loss)	315,076	(63,737)	321,421	556,214
Frontier Heritage Fund [Member]
Trading Commissions	(46,316)	(42,603)	(91,421)	(95,378)
Realized Gain/(Loss)	525,113	(5,832)	530,044	(550,409)
Change in Unrealized Gain/(Loss)	(177,497)	113,340	(60,196)	46,720
Net Income (Loss)	301,300	64,905	378,427	(599,067)
Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(34,737)	(45,478)	(61,854)	(56,221)
Realized Gain/(Loss)	(484,849)	(70,602)	(253,821)	(129,987)
Change in Unrealized Gain/(Loss)	666,439	(35,593)	326,887	(87,094)
Net Income (Loss)	146,853	(151,673)	11,212	(317,918)
Frontier Diversified Fund [Member]
Trading Commissions	(128,230)	(137,984)	(254,012)	(316,204)
Realized Gain/(Loss)	(922,162)	(32,465)	393,291	(1,142,581)
Change in Unrealized Gain/(Loss)	1,418,819	657,470	254,953	8,431
Net Income (Loss)	368,427	487,021	394,232	(1,450,354)
Frontier Masters Fund [Member]
Trading Commissions	(81,437)	(124,403)	(170,303)	(296,579)
Realized Gain/(Loss)	(534,537)	(207,032)	360,015	(628,285)
Change in Unrealized Gain/(Loss)	684,900	546,228	(221,650)	(278,220)
Net Income (Loss)	68,926	214,793	(31,938)	(1,203,084)
Frontier Winton Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		646,257		(252,761)
Net Income (Loss)		646,257		(252,761)
Frontier Trading Company II LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	382	302,930	(138,899)	67,960
Net Income (Loss)	382	302,930	(138,899)	67,960
Frontier Trading Company II LLC [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(23,564)		(337,431)
Net Income (Loss)	(23,564)		(337,431)
Frontier Trading Company II LLC [Member] \| Frontier Heritage Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(5,368)	129,198	(59,538)	6,663
Net Income (Loss)	(5,368)	129,198	(59,538)	6,663
Frontier Trading Company II LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(711)	156,848	(76,616)	6,222
Net Income (Loss)	(711)	156,848	(76,616)	6,222
Frontier Trading Company II LLC [Member] \| Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(4,502)	148,044	(65,952)	(94,552)
Net Income (Loss)	(4,502)	(94,552)	(65,952)	(94,552)
Frontier Trading Company XXXVIII [Member] \| Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,743)	(6,881)	(732)	(11,476)
Net Income (Loss)	(1,743)	(6,881)	(732)	(11,476)
Frontier Trading Company XXXVIII [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(178)		(14,574)
Net Income (Loss)	(178)		(14,574)
Frontier Trading Company XXXVIII [Member] \| Frontier Select Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(535)	(1,017)	(1,672)	4,561
Net Income (Loss)	(535)	(1,017)	(1,672)	4,561
Frontier Trading Company XXXVIII [Member] \| Frontier Heritage Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,597)	(3,728)	(4,379)	(4,695)
Net Income (Loss)	(1,597)	(3,728)	(4,379)	(4,695)
Frontier Trading Company XXXVIII [Member] \| Frontier Long/Short Commodity Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(469)	(1,870)	(1,029)	(1,812)
Net Income (Loss)	(469)	(1,870)	(1,029)	(1,812)
Frontier Trading Company XXXVIII [Member] \| Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,781)	8,804	(1,558)	17,218
Net Income (Loss)	(1,781)		(1,558)	17,218
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions	(7,956)	(13,073)	(22,370)	(43,897)
Realized Gain/(Loss)	500,989	(158,310)	635,922	(212,016)
Change in Unrealized Gain/(Loss)	(261,813)	72,621	201,668	6,928
Net Income (Loss)	231,220	98,762	815,220	(248,985)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions	(99,335)		(153,661)
Realized Gain/(Loss)	940,770		1,206,683
Change in Unrealized Gain/(Loss)	(341,757)		134,763
Net Income (Loss)	499,678		1,187,785
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] \| Frontier Heritage Fund [Member]
Trading Commissions	(24,706)		(41,734)
Realized Gain/(Loss)	183,352		245,955
Change in Unrealized Gain/(Loss)	(87,492)		67,220
Net Income (Loss)	71,154		271,441
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions	(9,102)	(5,137)	(19,559)	(21,609)
Realized Gain/(Loss)	292,763	(52,919)	379,795	(70,821)
Change in Unrealized Gain/(Loss)	(123,620)	24,207	103,977	2,309
Net Income (Loss)	160,041	(33,849)	464,213	(90,121)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] \| Frontier Masters Fund [Member]
Trading Commissions	(17,715)		(31,863)
Realized Gain/(Loss)	168,928		231,766
Change in Unrealized Gain/(Loss)	(60,575)		69,765
Net Income (Loss)	90,638		269,668
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions	(7,282)	(14,629)	(17,895)	(31,385)
Realized Gain/(Loss)	9,117	131,409	46,071	(158,568)
Change in Unrealized Gain/(Loss)	(12,265)	(38,608)	(78,813)	1,111
Net Income (Loss)	(10,430)	78,172	(50,637)	(188,842)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions	(6,039)	(9,617)	(14,073)	(19,728)
Realized Gain/(Loss)	5,628	72,926	28,047	(71,041)
Change in Unrealized Gain/(Loss)	(8,508)	(21,449)	(48,988)	1,112
Net Income (Loss)	(8,919)	41,860	(35,014)	(89,657)
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions	(104,751)	(141,047)	(173,562)	(228,504)
Realized Gain/(Loss)	(3,311,760)	(430,258)	(1,016,391)	369,476
Change in Unrealized Gain/(Loss)	2,622,781	805,293	(35,635)	13,457
Net Income (Loss)	(793,730)	233,988	(1,225,588)	154,429
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] \| Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(22,997)	(25,765)	(37,828)	(55,540)
Realized Gain/(Loss)	(636,737)	(63,680)	(379,307)	(106,500)
Change in Unrealized Gain/(Loss)	537,573	(118,815)	229,576	(43,080)
Net Income (Loss)	(122,161)	29,370	(187,559)	7,880
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions	(67,124)	(41,617)	(108,956)	(88,315)
Realized Gain/(Loss)	(2,123,330)	(209,611)	(912,164)	190,256
Change in Unrealized Gain/(Loss)	1,689,124	350,445	268,101	(45,473)
Net Income (Loss)	(501,330)	99,217	(753,019)	56,468
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] \| Frontier Masters Fund [Member]
Trading Commissions	(41,279)	(70,572)	(81,588)	(149,210)
Realized Gain/(Loss)	(1,069,832)	(207,046)	(163,846)	263,055
Change in Unrealized Gain/(Loss)	878,048	370,789	(188,680)	(103,684)
Net Income (Loss)	(233,063)	93,171	(434,114)	10,161
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions	(9,768)	(14,285)	(18,736)	(36,360)
Realized Gain/(Loss)	526,833	333,049	1,292,724	(138,701)
Change in Unrealized Gain/(Loss)	(184,438)	(63,193)	(74,396)	10,762
Net Income (Loss)	332,627	255,571	1,199,592	(164,299)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions	(11,268)	(9,912)	(20,998)	(19,585)
Realized Gain/(Loss)	351,448	(139,185)	811,110	(13,078)
Change in Unrealized Gain/(Loss)	(127,805)	(24,276)	(57,565)	8,453
Net Income (Loss)	212,375	104,997	732,547	(24,210)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions		(123)		(123)
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	305,427	(38,889)	286,677	(3,585)
Net Income (Loss)	305,427	(39,012)	286,677	(3,708)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] \| Frontier Long/Short Commodity Fund [Member]
Trading Commissions		(681)		(681)
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	172,203	(148,965)	142,869	(55,507)
Net Income (Loss)	172,203	(149,646)	142,869	(56,188)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)		(62)		(62)
Change in Unrealized Gain/(Loss)	152,338	(13,567)	144,793	3,942
Net Income (Loss)	152,338	(13,629)	144,793	3,880
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions	(21,074)	(37,583)	(49,975)	(73,528)
Realized Gain/(Loss)	(328,285)	292,017	(936,608)	(905,417)
Change in Unrealized Gain/(Loss)	179,439	423,980	185,088	60,858
Net Income (Loss)	(169,920)	678,414	(801,495)	(918,087)
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions	(15,429)	(20,301)	(35,222)	(41,686)
Realized Gain/(Loss)	(184,729)	132,708	(573,436)	(336,175)
Change in Unrealized Gain/(Loss)	103,314	177,519	114,005	1,742
Net Income (Loss)	(96,844)	(289,926)	(494,653)	(376,119)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions		(21,107)	(25,311)	(62,551)
Realized Gain/(Loss)		(149,161)	24,230	(72,693)
Change in Unrealized Gain/(Loss)	(105,511)	18,142	(121,258)	12,369
Net Income (Loss)	(105,511)	(152,126)	(122,339)	(122,875)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions		(11,738)	(13,254)	(37,240)
Realized Gain/(Loss)		(64,178)	10,639	(25,944)
Change in Unrealized Gain/(Loss)	(700)	8,247	(7,477)	5,361
Net Income (Loss)	(700)	(67,669)	(10,092)	(57,823)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions	(2,518)	(7,130)	(6,786)	(13,928)
Realized Gain/(Loss)	56,051	(53,768)	45,834	(42,692)
Change in Unrealized Gain/(Loss)	(6,885)	25,289	20,454	3,166
Net Income (Loss)	46,648	(35,609)	59,502	(53,454)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions	(2,990)	(7,950)	(7,948)	(15,597)
Realized Gain/(Loss)	50,835	(53,876)	45,318	(42,800)
Change in Unrealized Gain/(Loss)	(9,848)	25,289	20,527	3,166
Net Income (Loss)	37,997	(35,537)	57,897	(55,231)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] \| Frontier Balanced Fund [Member]
Trading Commissions	(21,136)	(63,787)	(45,648)	(137,437)
Realized Gain/(Loss)	1,171,891	(25,610)	986,448	(1,613,467)
Change in Unrealized Gain/(Loss)	(437,703)	(33,194)	(396,129)	86,852
Net Income (Loss)	713,052	(122,591)	544,671	(1,664,052)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] \| Frontier Select Fund [Member]
Trading Commissions	(18,439)	(10,721)	(33,911)	(80,091)
Realized Gain/(Loss)	189,845	23,055	222,739	(94,447)
Change in Unrealized Gain/(Loss)	(130,938)	37,712	(47,068)	(208,032)
Net Income (Loss)	40,468	50,046	141,760	(382,570)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] \| Frontier Heritage Fund [Member]
Trading Commissions	(21,610)	(42,603)	(49,687)	(95,378)
Realized Gain/(Loss)	341,761	(5,832)	284,089	(550,409)
Change in Unrealized Gain/(Loss)	(83,040)	(12,130)	(63,499)	44,752
Net Income (Loss)	237,111	(60,565)	170,903	(601,035)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] \| Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(11,740)	(19,032)	(24,026)	(44,616)
Realized Gain/(Loss)	151,888	(6,922)	125,486	(236,487)
Change in Unrealized Gain/(Loss)	(42,868)	(3,573)	(44,529)	13,305
Net Income (Loss)	97,280	(29,527)	56,931	(267,798)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions	(16,278)	(31,712)	(34,002)	(72,444)
Realized Gain/(Loss)	685,223	3,362	603,982	(772,916)
Change in Unrealized Gain/(Loss)	(254,362)	(22,990)	(196,808)	23,417
Net Income (Loss)	414,583	(51,340)	373,172	(821,943)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] \| Frontier Masters Fund [Member]
Trading Commissions	(7,140)	(44,250)	(17,916)	(100,181)
Realized Gain/(Loss)	82,721	(27,294)	77,286	(726,950)
Change in Unrealized Gain/(Loss)	(37,533)	(16,449)	47,910	13,640
Net Income (Loss)	38,048	(87,993)	107,280	(813,491)
Frontier Trading Company XXXIX, LLC [Member] \| Frontier Select Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	63,719	(41,578)	39,383	(41,578)
Net Income (Loss)	63,719	(41,578)	39,383	(41,578)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member] \| Frontier Select Fund [Member]
Trading Commissions	(20,114)	(42,595)	(44,428)	(61,704)
Realized Gain/(Loss)	312,950	(12,170)	259,691	(525,255)
Change in Unrealized Gain/(Loss)	(81,412)	(16,423)	(73,313)	67,762
Net Income (Loss)	211,424	(71,188)	141,950	(519,197)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member] \| Frontier Masters Fund [Member]
Trading Commissions	(15,303)	(9,581)	(38,936)	(47,188)
Realized Gain/(Loss)	283,646	27,308	214,809	(87,994)
Change in Unrealized Gain/(Loss)	(88,757)	35,040	(83,135)	(179,255)
Net Income (Loss)	179,586	52,767	92,738	(314,437)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member] \| Frontier Long/Short Commodity Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)
Net Income (Loss)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member] \| Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)				(76,396)
Change in Unrealized Gain/(Loss)				68,413
Net Income (Loss)				(7,983)
Frontier Trading Company XXXVIII, LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(403)	(2,803)	(8,996)	(1,820)
Net Income (Loss)	$ (403)	(2,803)	$ (8,996)	(1,820)
Frontier Trading Company XXXVIII, LLC [Member] \| Frontier Winton Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		(29,123)		(66,205)
Net Income (Loss)		(29,123)		(66,205)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member] \| Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)
Net Income (Loss)
Frontier Trading Company XV, LLC [Member] \| Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)
Net Income (Loss)
Frontier Trading Company II, LLC [Member] \| Frontier Winton Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		675,380		(186,556)
Net Income (Loss)		$ 675,380		$ (186,556)

Investments in Unconsolidated_4

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member]	6 Months Ended
	Jun. 30, 2019
Frontier Diversified Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] \| Option Trading [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] \| Option Trading [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Select Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Select Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Frontier Heritage Fund [Member] \| Multi-Strategy [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Heritage Fund [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Trend Following [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None

Investments in Private Invest_2

Investments in Private Investment Companies (Frontier Funds) (Details) - Frontier Funds [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Trading Commissions	$ (603,093)	$ (712,820)	$ (1,169,873)	$ (1,578,844)
Realized Gain/(Loss)	(1,348,034)	(365,678)	3,796,872	(5,545,458)
Change in Unrealized Gain/(Loss)	4,103,867	1,990,501	440,067	(262,192)
Net Income (Loss)	2,152,740	912,003	3,067,066	(7,386,494)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Trading Commissions	(158,814)	(18,210)	(269,187)	(68,124)
Realized Gain/(Loss)	2,086,802	(211,229)	2,700,121	(282,837)
Change in Unrealized Gain/(Loss)	(875,257)	96,828	577,393	9,237
Net Income (Loss)	1,052,731	(132,611)	3,008,327	(341,724)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member]
Trading Commissions
Realized Gain/(Loss)				(76,396)
Change in Unrealized Gain/(Loss)				68,413
Net Income (Loss)				(7,983)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Trading Commissions	(13,321)	(24,246)	(31,968)	(51,029)
Realized Gain/(Loss)	14,745	204,335	74,118	(229,609)
Change in Unrealized Gain/(Loss)	(20,773)	(60,057)	(127,801)	2,223
Net Income (Loss)	(19,349)	120,032	(85,651)	(278,415)
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Trading Commissions	(236,151)	(279,001)	(401,934)	(521,358)
Realized Gain/(Loss)	(7,141,659)	(910,595)	(2,471,708)	929,287
Change in Unrealized Gain/(Loss)	5,727,526	1,645,342	273,362	(178,780)
Net Income (Loss)	(1,650,284)	455,746	(2,600,280)	229,149
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Trading Commissions	(21,036)	(24,197)	(39,734)	(53,977)
Realized Gain/(Loss)	878,281	472,234	2,103,831	(151,779)
Change in Unrealized Gain/(Loss)	(312,243)	(87,469)	(131,961)	19,215
Net Income (Loss)	545,002	360,568	1,932,139	(186,541)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Trading Commissions		(804)		(804)
Realized Gain/(Loss)		(62)		(62)
Change in Unrealized Gain/(Loss)	629,968	(201,421)	574,339	(54,811)
Net Income (Loss)	629,968	(202,287)	574,339	(55,677)
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Trading Commissions	(36,503)	(57,884)	(85,197)	(115,169)
Realized Gain/(Loss)	(513,014)	424,725	(1,510,044)	(944,354)
Change in Unrealized Gain/(Loss)	282,753	601,499	299,093	62,600
Net Income (Loss)	(266,764)	968,340	(1,296,148)	(996,923)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Trading Commissions		(32,845)	(38,565)	(99,908)
Realized Gain/(Loss)		(213,339)	34,869	(98,637)
Change in Unrealized Gain/(Loss)	(106,211)	26,389	(128,735)	17,730
Net Income (Loss)	(106,211)	(219,795)	(132,431)	(180,815)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Trading Commissions	(5,508)	(15,080)	(14,734)	(29,450)
Realized Gain/(Loss)	106,886	(107,644)	91,152	(83,146)
Change in Unrealized Gain/(Loss)	(16,733)	50,578	40,981	6,332
Net Income (Loss)	84,645	(72,146)	117,399	(106,264)
Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(48,550)	(49,181)	(80,033)	(76,792)
Net Income (Loss)	(48,550)	(49,181)	(80,033)	(76,792)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Trading Commissions	(35,417)	(20,302)	(83,364)	(95,405)
Realized Gain/(Loss)	596,596	50,363	474,500	(147,216)
Change in Unrealized Gain/(Loss)	(170,169)	72,752	(156,448)	(333,152)
Net Income (Loss)	391,010	102,813	234,688	(575,773)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Trading Commissions	(96,343)	(240,251)	(205,190)	(543,620)
Realized Gain/(Loss)	2,623,329	(74,466)	230,030	(4,460,709)
Change in Unrealized Gain/(Loss)	(986,444)	(104,759)	(700,123)	195,593
Net Income (Loss)	$ 1,540,542	$ (419,476)	$ 1,394,717	$ (4,808,736)

Investments in Private Invest_3

Investments in Private Investment Companies (Frontier Funds) (Details 1) - Frontier Funds [Member]	6 Months Ended
	Jun. 30, 2019
Multi-Strategy [Member] \| Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] \| Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] \| Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] \| Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] \| Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] \| Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] \| Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] \| Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Option Trading [Member] \| Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None

Transactions with Affiliates _2

Transactions with Affiliates (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Frontier Diversified Fund [Member]
Incentive (Rebate) Fees				$ 1,881
Management Fee		13,229	2,668	24,792
Risk Analysis Fees
Service Fee	11,366	14,689	23,395	30,804
Trading Fee	126,026	143,613	256,330	308,763
Frontier Masters Fund [Member]
Incentive (Rebate) Fees
Management Fee	2,072	28,862	7,665	61,211
Risk Analysis Fees
Service Fee	2,268	12,929	9,754	27,898
Trading Fee	58,718	105,998	126,036	240,046
Frontier Long/Short Commodity Fund [Member]
Incentive (Rebate) Fees
Management Fee
Risk Analysis Fees
Service Fee	152	407	314	1,064
Trading Fee	14,365	21,519	28,217	46,212
Frontier Balanced Fund [Member]
Incentive (Rebate) Fees				145,134
Management Fee	5,286	22,566	13,365	42,902
Risk Analysis Fees		1,692		3,529
Service Fee	154,061	237,810	324,926	500,791
Trading Fee	248,123	344,769	527,460	728,945
Frontier Select Fund [Member]
Incentive (Rebate) Fees
Management Fee
Risk Analysis Fees
Service Fee	26,562	33,273	52,067	72,962
Trading Fee	22,475	28,109	45,107	72,962
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Incentive (Rebate) Fees
Management Fee	9,531	131,682	38,679	262,342
Risk Analysis Fees
Service Fee	42,779	80,907	94,902	175,167
Trading Fee	82,598	80,703	125,313	163,278
Frontier Heritage Fund [Member]
Incentive (Rebate) Fees				1,394
Management Fee	1,100	33,893	7,289	69,874
Risk Analysis Fees
Service Fee	20,713	31,302	43,898	68,410
Trading Fee	$ 29,653	$ 36,855	$ 56,746	$ 79,147

Transactions with Affiliates _3

Transactions with Affiliates (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Incentive Fees		$ 10,897
Management Fees		3,875
Interest Fees
Service Fees	2,464	4,498
Trading Fees Payable	36,982	44,827
Risk Analysis Fees
Frontier Masters Fund [Member]
Incentive Fees
Management Fees		8,347
Interest Fees
Service Fees	201	1,750
Trading Fees Payable	14,956	27,984
Risk Analysis Fees
Frontier Long/Short Commodity Fund [Member]
Incentive Fees
Management Fees
Interest Fees
Service Fees	4	51
Trading Fees Payable	4,793	5,306
Risk Analysis Fees
Frontier Balanced Fund [Member]
Incentive Fees
Management Fees	8,828	13,917
Interest Fees		1,490
Service Fees	45,227	56,791
Trading Fees Payable	76,075	101,770
Risk Analysis Fees	9,994
Frontier Select Fund [Member]
Incentive Fees
Management Fees
Interest Fees	335
Service Fees	8,212	8,575
Trading Fees Payable	7,120	7,812
Risk Analysis Fees
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Incentive Fees
Management Fees		42,705
Interest Fees	660	8,124
Service Fees	12,926	17,803
Trading Fees Payable	23,122	24,353
Risk Analysis Fees
Frontier Heritage Fund [Member]
Incentive Fees
Management Fees		9,201
Interest Fees	635	1,238
Service Fees	6,240	6,684
Trading Fees Payable	10,467	$ 10,189
Risk Analysis Fees

Transactions with Affiliates _4

Transactions with Affiliates (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Managing Owner [Member]
Gross Amount Paid to the Managing Owner	$ 8,299	$ 65,583	$ 33,908	$ 100,968
Frontier Diversified Fund [Member] \| Class 1 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Diversified Fund [Member] \| Class 2 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Diversified Fund [Member] \| Class 3 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Masters Fund [Member] \| Class 1 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Masters Fund [Member] \| Class 2 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Masters Fund [Member] \| Class 3 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] \| Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 3	$ 37	$ 9	$ 37
Ratio to Average Net Assets	0.00%	0.02%	0.01%	0.02%
Frontier Long/Short Commodity Fund [Member] \| Class 3 [Member]
Gross Amount Paid to the Managing Owner	$ 81	$ 488	$ 208	$ 488
Ratio to Average Net Assets	0.00%	0.02%	0.01%	0.02%
Frontier Long/Short Commodity Fund [Member] \| Class 1a [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] \| Class 2a [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] \| Class 3a [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.00%
Frontier Balanced Fund [Member] \| Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 1,150	$ 14,652	$ 2,881	$ 14,652
Ratio to Average Net Assets	0.01%	0.05%	0.01%	0.04%
Frontier Balanced Fund [Member] \| Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 232	$ 2,656	$ 555	$ 2,656
Ratio to Average Net Assets	0.01%	0.05%	0.01%	0.04%
Frontier Balanced Fund [Member] \| Class 2a [Member]
Gross Amount Paid to the Managing Owner	$ 3	$ 39	$ 7	$ 39
Ratio to Average Net Assets	0.00%	0.01%	0.00%	0.01%
Frontier Balanced Fund [Member] \| Class 3a [Member]
Gross Amount Paid to the Managing Owner	$ 10	$ 108	$ 23	$ 108
Ratio to Average Net Assets	0.00%	0.01%	0.00%	0.01%
Frontier Balanced Fund [Member] \| Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 19	$ 256	$ 45	$ 256
Ratio to Average Net Assets	0.01%	0.05%	0.01%	0.05%
Frontier Select Fund [Member] \| Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 1,400	$ 3,375	$ 2,259	$ 5,835
Ratio to Average Net Assets	0.04%	0.08%	0.06%	0.12%
Frontier Select Fund [Member] \| Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 41	$ 359	$ 71	$ 724
Ratio to Average Net Assets	0.04%	0.08%	0.06%	0.11%
Frontier Select Fund [Member] \| Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 3	$ 15	$ 3	$ 25
Ratio to Average Net Assets	0.05%	0.08%	0.08%	0.12%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 3,631	$ 34,013	$ 22,360	$ 62,703
Ratio to Average Net Assets	0.06%	0.32%	0.35%	0.53%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 252	$ 3,251	$ 1,286	$ 7,028
Ratio to Average Net Assets	0.06%	0.32%	0.32%	0.52%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] \| Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 21	$ 111	$ 105	$ 194
Ratio to Average Net Assets	0.06%	0.32%	0.32%	0.54%
Frontier Heritage Fund [Member] \| Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 1,196	$ 5,382	$ 3,424	$ 5,382
Ratio to Average Net Assets	0.04%	0.13%	0.12%	0.12%
Frontier Heritage Fund [Member] \| Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 255	$ 836	$ 669	$ 836
Ratio to Average Net Assets	0.04%	0.13%	0.11%	0.12%
Frontier Heritage Fund [Member] \| Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 2	$ 5	$ 3	$ 5
Ratio to Average Net Assets	0.05%	0.12%	0.12%	0.10%

Transactions with Affiliates _5

Transactions with Affiliates (The Series of the Frontier Funds) (Details Textual) - The Series of the Frontier Funds [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Transactions with Affiliates (Textual)
Description of incentive fee percentage	The incentive fee is 25% for the Frontier Balanced Fund and the Frontier Diversified Fund and 20% for the Frontier Global Fund, Frontier Heritage Fund, Frontier Select Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund.
Description of range of incentive fee percentage	(i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.	(i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.
Description of service fees	Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents.
Description of interest income	Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) of average net assets less any fair market value related to swaps is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a, and Class 3a only), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a) 100% of the interest is retained by the respective Series.
Frontier Balanced Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 296,547
Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	136
Frontier Diversified Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	23,105
Frontier Masters Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	31,765
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	145,067
Frontier Heritage Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	53,155
Frontier Select Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 14,233
Managing Owner [Member]
Transactions with Affiliates (Textual)
Percentage of minimum purchase commitment	1.00%
Percentage of contributes funds to trust	1.00%
Percentage of interest in specific series of trust	1.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member]
Transactions with Affiliates (Textual)
Percentage of FCM fee	2.25%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 1AP [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	0.50%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 2a [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	0.50%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 1 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 2 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 3a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of FCM fee	2.25%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.50%	1.50%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 2a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 2 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	3.50%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 3a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 1a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 3 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	3.50%
Managing Owner [Member] \| Frontier Diversified Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	0.75%
Percentage of FCM fee	2.25%
Managing Owner [Member] \| Frontier Diversified Fund [Member] \| Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%
Managing Owner [Member] \| Frontier Masters Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Managing Owner [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Managing Owner [Member] \| Frontier Heritage Fund [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Managing Owner [Member] \| Frontier Heritage Fund [Member] \| Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%
Managing Owner [Member] \| Frontier Select Fund [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Managing Owner [Member] \| Frontier Select Fund [Member] \| Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%

Transactions with Affiliates (F

Transactions with Affiliates (Frontier Funds) (Details) - Frontier Funds [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Transactions with Affiliates (Frontier Funds) (Textual)
Trust paid for incentive fees				$ 148,409
Trust paid for management fees	17,989	230,232	69,666	461,121
Trust paid for service fees	257,901	411,318	549,256	877,098
Trust paid for trading fees	581,958	761,690	$ 1,165,209	1,632,215
Managing Owner [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of contributes funds to trust			1.00%
Percentage of minimum purchase commitment			1.00%
Percentage of interest in specific series of trust			1.00%
Trust had payable for incentive fees	0		$ 0		$ 10,897
Trust had payable for management fees	8,828		8,828		78,045
Trust had payable for interest fees	1,630		1,630		10,852
Trust had payable for service fees	173,515		173,515		96,152
Trust had payable for risk analysis fees	9,994		9,994
Trust had payable for trading fees	75,274		75,274		$ 222,241
Trust paid for incentive fees	0	0	0	148,409
Trust paid for management fees	17,989	230,232	69,666	461,121
Trust paid for risk analysis fees	(3,820)		2,872
Trust paid for service fees	257,901	411,318	549,256	877,096
Trust paid for trading fees	$ 581,958	761,690	1,165,209	$ 1,632,215
Trust paid		$ 55,400	$ 8,299
Managing Owner [Member] \| Class 1 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	3.00%		3.00%
Managing Owner [Member] \| Class 1a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	2.00%		2.00%
Managing Owner [Member] \| Class 2 Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	0.25%		0.25%
Managing Owner [Member] \| Frontier Balanced Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of FCM fee	2.25%		2.25%
Percentage of series NAV	0.12%		0.12%
Percentage of incentive fee	25.00%		25.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%		1.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Swap [Member] \| Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%		25.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Swap [Member] \| Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%		20.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 1 and Class 2 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	0.50%		0.50%
Percentage of aggregate interest income	2.00%		2.00%
Managing Owner [Member] \| Frontier Balanced Fund [Member] \| Class 1AP, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%		1.00%
Percentage of interest is retained by respective series	100.00%		100.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of FCM fee	2.25%		2.25%
Percentage of series NAV	0.12%		0.12%
Percentage of incentive fee	20.00%		20.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.50%		1.50%
Percentage of incentive fee	25.00%		25.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 1a, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%		2.00%
Percentage of interest is retained by respective series	100.00%		100.00%
Managing Owner [Member] \| Frontier Long/Short Commodity Fund [Member] \| Class 2 and Class 3 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	3.50%		3.50%
Percentage of aggregate interest income	2.00%		2.00%
Managing Owner [Member] \| Frontier Diversified Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	0.75%		0.75%
Percentage of FCM fee	2.25%		2.25%
Percentage of series NAV	0.12%		0.12%
Percentage of incentive fee	25.00%		25.00%
Managing Owner [Member] \| Frontier Diversified Fund [Member] \| Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%		1.00%
Managing Owner [Member] \| Frontier Diversified Fund [Member] \| Swap [Member] \| Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%		25.00%
Managing Owner [Member] \| Frontier Diversified Fund [Member] \| Swap [Member] \| Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%		20.00%
Managing Owner [Member] \| Frontier Diversified Fund [Member] \| Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Diversified Fund [Member] \| Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Diversified Fund [Member] \| Class 1a, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest is retained by respective series	100.00%		100.00%
Managing Owner [Member] \| Frontier Masters Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%		2.00%
Percentage of FCM fee	2.25%		2.25%
Percentage of series NAV	0.12%		0.12%
Percentage of incentive fee	20.00%		20.00%
Managing Owner [Member] \| Frontier Masters Fund [Member] \| Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Masters Fund [Member] \| Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Managing Owner [Member] \| Frontier Masters Fund [Member] \| Class 1AP, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest is retained by respective series	100.00%		100.00%
Managing Owner [Member] \| Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%		2.00%
Percentage of FCM fee	2.25%		2.25%
Percentage of series NAV	0.12%		0.12%
Percentage of incentive fee	20.00%		20.00%
Percentage of aggregate interest income	2.00%		2.00%
Managing Owner [Member] \| Frontier Heritage Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.50%		2.50%
Percentage of FCM fee	2.25%		2.25%
Percentage of series NAV	0.12%		0.12%
Percentage of incentive fee	20.00%		20.00%
Percentage of aggregate interest income	2.00%		2.00%
Managing Owner [Member] \| Frontier Heritage Fund [Member] \| Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%		1.00%
Percentage of incentive fee	15.00%		15.00%
Managing Owner [Member] \| Frontier Select Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.50%		2.50%
Percentage of FCM fee	2.25%		2.25%
Percentage of series NAV	0.12%		0.12%
Percentage of incentive fee	20.00%		20.00%
Percentage of aggregate interest income	2.00%		2.00%

Financial Highlights (The Serie

Financial Highlights (The Series of the Frontier Funds) (Details) - Series of Frontier Funds [Member] - $ / shares		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Frontier Heritage Fund [Member] \| Class 1AP [Member]
Net asset value	[1]	$ 112.44	$ 116.64	$ 111.78	$ 134.28
Interest income	[1]	0	0	0	0
Expenses	[1]	(1.12)	(1.68)	(2.16)	(3.48)
Net gain/(loss) on investments, net of non-controlling interests	[1]	15.02	0.50	16.72	(15.34)
Net income/(loss)	[1]	13.9	(1.18)	14.56	(18.82)
Net asset value	[1]	$ 126.34	$ 115.46	$ 126.34	$ 115.46
Net investment income/(loss)		(3.71%)	(5.87%)	(7.34%)	(5.69%)
Expenses before incentive fees	[2],[3]	3.71%	5.87%	7.34%	5.67%
Expenses after incentive fees	[2],[3]	3.71%	5.87%	7.34%	5.69%
Total return before incentive fee	[4]	12.36%	(1.01%)	13.03%	(13.99%)
Total return after incentive fees	[4]	12.36%	(1.01%)	13.03%	(14.02%)
Frontier Heritage Fund [Member] \| Class 1 [Member]
Net asset value	[1]	$ 99.68	$ 104.50	$ 99.83	$ 121.19
Interest income	[1]	0	0	0	0
Expenses	[1]	(1.71)	(2.27)	(3.24)	(6.87)
Net gain/(loss) on investments, net of non-controlling interests	[1]	11.63	0.45	13.01	(13.77)
Net income/(loss)	[1]	9.92	(1.82)	9.77	(18.51)
Net asset value	[1]	$ 109.6	$ 102.68	$ 109.6	$ 102.68
Net investment income/(loss)		(6.75%)	(8.87%)	(13.39%)	(8.69%)
Expenses before incentive fees	[2],[3]	6.75%	8.87%	13.39%	8.66%
Expenses after incentive fees	[2],[3]	6.75%	8.87%	13.39%	8.69%
Total return before incentive fee	[4]	9.95%	(1.74%)	9.79%	(15.25%)
Total return after incentive fees	[4]	9.95%	(1.74%)	9.79%	(15.27%)
Frontier Heritage Fund [Member] \| Class 2 [Member]
Net asset value	[1]	$ 153.46	$ 156.11	$ 152.53	$ 179.7
Interest income	[1]	0	0	0	0
Expenses	[1]	(1.46)	(2.25)	(2.75)	(2.38)
Net gain/(loss) on investments, net of non-controlling interests	[1]	17.96	0.68	20.18	(21.21)
Net income/(loss)	[1]	16.5	(1.57)	17.43	(23.59)
Net asset value	[1]	$ 169.96	$ 156.11	$ 169.96	$ 156.11
Net investment income/(loss)		(3.71%)	(5.87%)	(7.34%)	(5.52%)
Expenses before incentive fees	[2],[3]	3.71%	5.87%	7.34%	5.50%
Expenses after incentive fees	[2],[3]	3.71%	5.87%	7.34%	5.52%
Total return before incentive fee	[4]	10.75%	(1.01%)	11.43%	(13.10%)
Total return after incentive fees	[4]	10.75%	(1.01%)	11.43%	(13.13%)
Frontier Global Fund (formerly Winton Fund) [Member] \| Class 1AP [Member]
Net asset value	[1]			$ 149.92	$ 176.44
Interest income	[1]			0	0
Expenses	[1]			(3.73)	(2.55)
Net gain/(loss) on investments, net of non-controlling interests	[1]			19.94	(12.28)
Net income/(loss)	[1]			16.21	(14.83)
Net asset value	[1]	$ 166.13	$ 161.61	$ 166.13	$ 161.61
Net investment income/(loss)				(9.78%)	(5.98%)
Expenses before incentive fees	[2],[3]			9.78%	5.98%
Expenses after incentive fees	[2],[3]			9.78%	5.98%
Total return before incentive fee	[4]			10.81%	(8.41%)
Total return after incentive fees	[4]			10.81%	(8.41%)
Frontier Global Fund (formerly Winton Fund) [Member] \| Class 1 [Member]
Net asset value	[1]			$ 131.57	$ 159.08
Interest income	[1]			0	0
Expenses	[1]			(5.21)	(7.15)
Net gain/(loss) on investments, net of non-controlling interests	[1]			17.28	(3.27)
Net income/(loss)	[1]			12.07	(10.42)
Net asset value	[1]	143.64	148.66	$ 143.64	$ 148.66
Net investment income/(loss)				(15.82%)	(9.53%)
Expenses before incentive fees	[2],[3]			15.82%	9.53%
Expenses after incentive fees	[2],[3]			15.82%	9.53%
Total return before incentive fee	[4]			9.17%	(6.55%)
Total return after incentive fees	[4]			9.17%	(6.55%)
Frontier Global Fund (formerly Winton Fund) [Member] \| Class 2 [Member]
Net asset value	[1]			$ 187.17	$ 216.5
Interest income	[1]			0	0
Expenses	[1]			(4.65)	(3.24)
Net gain/(loss) on investments, net of non-controlling interests	[1]			24.96	(16.50)
Net income/(loss)	[1]			20.31	(19.74)
Net asset value	[1]	207.48	196.76	$ 207.48	$ 196.76
Net investment income/(loss)				(9.78%)	(5.98%)
Expenses before incentive fees	[2],[3]			9.78%	5.98%
Expenses after incentive fees	[2],[3]			9.78%	5.98%
Total return before incentive fee	[4]			10.85%	(9.12%)
Total return after incentive fees	[4]			10.85%	(9.12%)
Frontier Select Fund [Member] \| Class 1AP [Member]
Net asset value	[1]	82.3	85.36	$ 82.48	$ 100.02
Interest income	[1]	0	0	0	0
Expenses	[1]	(0.52)	(0.48)	(1.04)	(1.05)
Net gain/(loss) on investments, net of non-controlling interests	[1]	6.56	(0.81)	6.90	(14.90)
Net income/(loss)	[1]	6.04	(1.29)	5.86	(15.95)
Net asset value	[1]	$ 88.34	$ 84.07	$ 88.34	$ 84.07
Net investment income/(loss)		(2.49%)	(2.28%)	(5.06%)	(2.38%)
Expenses before incentive fees	[2],[3]	2.49%	2.28%	5.06%	2.38%
Expenses after incentive fees	[2],[3]	2.49%	2.28%	5.06%	2.38%
Total return before incentive fee	[4]	7.34%	(1.51%)	7.10%	(15.95%)
Total return after incentive fees	[4]	7.34%	(1.51%)	7.10%	(15.95%)
Frontier Select Fund [Member] \| Class 1 [Member]
Net asset value	[1]	$ 70.76	$ 76.47	$ 71.41	$ 90.27
Interest income	[1]	0	0	0	0
Expenses	[1]	(1)	(0.98)	(1.92)	(2.13)
Net gain/(loss) on investments, net of non-controlling interests	[1]	6.27	(0.74)	6.54	(13.39)
Net income/(loss)	[1]	5.27	(1.72)	4.62	(15.52)
Net asset value	[1]	$ 76.03	$ 74.75	$ 76.03	$ 74.75
Net investment income/(loss)		(5.52%)	(5.28%)	(11.10%)	(5.38%)
Expenses before incentive fees	[2],[3]	5.52%	5.28%	11.10%	5.38%
Expenses after incentive fees	[2],[3]	5.52%	5.28%	11.10%	5.38%
Total return before incentive fee	[4]	7.45%	(2.25%)	6.47%	(17.19%)
Total return after incentive fees	[4]	7.45%	(2.25%)	6.47%	(17.19%)
Frontier Select Fund [Member] \| Class 2 [Member]
Net asset value	[1]	$ 107.99	$ 113.28	$ 108.18	$ 132.73
Interest income	[1]	0	0	0	0
Expenses	[1]	(0.69)	(0.63)	(1.33)	(1.42)
Net gain/(loss) on investments, net of non-controlling interests	[1]	9.66	(1.09)	10.11	(19.75)
Net income/(loss)	[1]	8.97	(1.72)	8.78	(21.17)
Net asset value	[1]	$ 116.96	$ 111.56	$ 116.96	$ 111.56
Net investment income/(loss)		(2.49%)	(2.28%)	(5.06%)	(2.38%)
Expenses before incentive fees	[2],[3]	2.49%	2.28%	5.06%	2.38%
Expenses after incentive fees	[2],[3]	2.49%	2.28%	5.06%	2.38%
Total return before incentive fee	[4]	8.31%	(1.52%)	8.12%	(15.95%)
Total return after incentive fees	[4]	8.31%	(1.52%)	8.12%	(15.95%)
Frontier Balanced Fund [Member] \| Class 1AP [Member]
Net asset value	[1]	$ 132.01	$ 139.33	$ 134.16	$ 150.56
Interest income	[1]	0.07	0.03	0.12	0.08
Expenses	[1]	(1.30)	(1.29)	(2.60)	(3.10)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.91	2.61	3.01	(6.86)
Net income/(loss)	[1]	2.68	1.35	0.53	(9.88)
Net asset value	[1]	$ 134.69	$ 140.68	$ 134.69	$ 140.68
Net investment income/(loss)		(3.72%)	(3.64%)	(7.63%)	(3.95%)
Expenses before incentive fees	[2],[3]	3.93%	3.73%	8.00%	3.72%
Expenses after incentive fees	[2],[3]	3.93%	3.73%	8.00%	4.07%
Total return before incentive fee	[4]	2.03%	0.97%	0.40%	(6.22%)
Total return after incentive fees	[4]	2.03%	0.97%	0.40%	(6.56%)
Frontier Balanced Fund [Member] \| Class 1 [Member]
Net asset value	[1]	$ 114.89	$ 124.93	$ 117.63	$ 135.96
Interest income	[1]	0.06	0.03	0.10	0.08
Expenses	[1]	(2)	(2.08)	(3.96)	(4.64)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.41	2.33	2.59	(6.16)
Net income/(loss)	[1]	1.47	0.28	(1.27)	(10.75)
Net asset value	[1]	$ 116.36	$ 125.21	$ 116.36	$ 125.21
Net investment income/(loss)		(6.76%)	(6.64%)	(13.67%)	(6.94%)
Expenses before incentive fees	[2],[3]	6.97%	6.73%	14.04%	6.72%
Expenses after incentive fees	[2],[3]	6.97%	6.73%	14.04%	7.06%
Total return before incentive fee	[4]	1.28%	0.22%	(1.08%)	(7.56%)
Total return after incentive fees	[4]	1.28%	0.22%	(1.08%)	(7.91%)
Frontier Balanced Fund [Member] \| Class 2 [Member]
Net asset value	[1]	$ 178.04	$ 187.88	$ 180.94	$ 202.9
Interest income	[1]	0.09	0.04	0.16	0.07
Expenses	[1]	(1.76)	(1.74)	(3.50)	(2.41)
Net gain/(loss) on investments, net of non-controlling interests	[1]	5.28	3.54	4.06	(12.68)
Net income/(loss)	[1]	3.62	1.84	0.72	(15.02)
Net asset value	[1]	$ 181.66	$ 187.88	$ 181.66	$ 187.88
Net investment income/(loss)		(3.72%)	(3.64%)	(7.63%)	(3.89%)
Expenses before incentive fees	[2],[3]	3.93%	3.73%	8.00%	3.72%
Expenses after incentive fees	[2],[3]	3.93%	3.73%	8.00%	4.05%
Total return before incentive fee	[4]	2.03%	0.98%	0.40%	(7.08%)
Total return after incentive fees	[4]	2.03%	0.98%	0.40%	(7.40%)
Frontier Balanced Fund [Member] \| Class 3a [Member]
Net asset value	[1]	$ 153.78	$ 162.12	$ 156.26	$ 175.18
Interest income	[1]	0.08	0.03	0.14	0.10
Expenses	[1]	(1.52)	(1.50)	(3.03)	(3.62)
Net gain/(loss) on investments, net of non-controlling interests	[1]	4.57	3.12	3.54	(7.89)
Net income/(loss)	[1]	3.13	1.65	0.65	(11.41)
Net asset value	[1]	$ 156.91	$ 163.77	$ 156.91	$ 163.77
Net investment income/(loss)		(3.72%)	(3.64%)	(7.63%)	(3.95%)
Expenses before incentive fees	[2],[3]	3.93%	3.73%	8.00%	3.72%
Expenses after incentive fees	[2],[3]	3.93%	3.73%	8.00%	4.07%
Total return before incentive fee	[4]	2.04%	1.02%	0.42%	(6.17%)
Total return after incentive fees	[4]	2.04%	1.02%	0.42%	(6.51%)
Frontier Balanced Fund [Member] \| Class 2a [Member]
Net asset value	[1]	$ 154.27	$ 162.67	$ 156.81	$ 175.77
Interest income	[1]	0.08	0.03	0.14	0.10
Expenses	[1]	(1.52)	(1.51)	(3.04)	(3.63)
Net gain/(loss) on investments, net of non-controlling interests	[1]	4.66	3.14	3.58	(7.91)
Net income/(loss)	[1]	3.22	1.66	0.68	(11.44)
Net asset value	[1]	$ 157.49	$ 164.33	$ 157.49	$ 164.33
Net investment income/(loss)		(3.72%)	(3.64%)	(7.63%)	(3.95%)
Expenses before incentive fees	[2],[3]	3.93%	3.73%	8.00%	3.72%
Expenses after incentive fees	[2],[3]	3.93%	3.73%	8.00%	4.07%
Total return before incentive fee	[4]	2.09%	1.02%	0.43%	(6.16%)
Total return after incentive fees	[4]	2.09%	1.02%	0.43%	(6.51%)
Frontier Long/Short Commodity Fund [Member] \| Class 2 [Member]
Net asset value	[1]	$ 93.67	$ 112.44		$ 115.81
Interest income	[1]	0.02	0.11		0.22
Expenses	[1]	(0.66)	(0.67)		(1.36)
Net gain/(loss) on investments, net of non-controlling interests	[1]	5.49	(5.36)		(8.15)
Net income/(loss)	[1]	4.85	(5.92)		(9.29)
Net asset value	[1]	$ 98.52	$ 106.52	$ 98.52	$ 106.52
Net investment income/(loss)		(2.66%)	(2.05%)		(2.02%)
Expenses before incentive fees	[2],[3]	2.74%	2.43%		2.41%
Expenses after incentive fees	[2],[3]	2.74%	2.43%		2.41%
Total return before incentive fee	[4]	5.18%	(5.27%)		(8.02%)
Total return after incentive fees	[4]	5.18%	(5.27%)		(8.02%)
Frontier Long/Short Commodity Fund [Member] \| Class 3a [Member]
Net asset value	[1]	$ 61.96	$ 94.24		$ 97.99
Interest income	[1]	0.01	0.09		0.19
Expenses	[1]	(0.44)	(0.56)		(1.15)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.92	(7.66)		(10.92)
Net income/(loss)	[1]	3.49	(8.13)		(11.88)
Net asset value	[1]	$ 65.45	$ 86.11	65.45	$ 86.11
Net investment income/(loss)		(2.66%)	(2.05%)		(2.02%)
Expenses before incentive fees	[2],[3]	2.74%	2.43%		2.41%
Expenses after incentive fees	[2],[3]	2.74%	2.43%		2.41%
Total return before incentive fee	[4]	5.63%	(8.63%)		(1212.00%)
Total return after incentive fees	[4]	5.63%	(8.63%)		(1212.00%)
Frontier Long/Short Commodity Fund [Member] \| Class 2a [Member]
Net asset value	[1]	$ 58.96	$ 89.95		$ 93.59
Interest income	[1]	0.01	0.08		0.18
Expenses	[1]	(0.41)	(0.53)		(1.10)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.68	(7.37)		(10.54)
Net income/(loss)	[1]	3.28	(7.82)		(11.46)
Net asset value	[1]	$ 62.24	$ 82.13	62.24	$ 82.13
Net investment income/(loss)		(2.66%)	(2.05%)		(2.02%)
Expenses before incentive fees	[2],[3]	2.74%	2.43%		2.41%
Expenses after incentive fees	[2],[3]	2.74%	2.43%		2.41%
Total return before incentive fee	[4]	5.56%	(8.69%)		(12.24%)
Total return after incentive fees	[4]	5.56%	(8.69%)		(12.24%)
Frontier Long/Short Commodity Fund [Member] \| Class 1a [Member]
Net asset value	[1]	$ 50.14	$ 77.86		$ 81.35
Interest income	[1]	0.01	0.07		0.16
Expenses	[1]	(0.82)	(1.23)		(2.42)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.53	(5.92)		(8.31)
Net income/(loss)	[1]	2.72	(7.08)		(10.57)
Net asset value	[1]	$ 52.86	$ 70.78	52.86	$ 70.78
Net investment income/(loss)		(6.30%)	(6.13%)		(5.67%)
Expenses before incentive fees	[2],[3]	6.38%	6.51%		6.06%
Expenses after incentive fees	[2],[3]	6.38%	6.51%		6.06%
Total return before incentive fee	[4]	5.42%	(9.09%)		(12.99%)
Total return after incentive fees	[4]	5.42%	(9.09%)		(12.99%)
Frontier Long/Short Commodity Fund [Member] \| Class 3 [Member]
Net asset value	[1]	$ 98.25	$ 117.97		$ 121.5
Interest income	[1]	0.02	0.11		0.12
Expenses	[1]	(0.69)	(0.70)		(0.72)
Net gain/(loss) on investments, net of non-controlling interests	[1]	5.76	(5.63)		(2.93)
Net income/(loss)	[1]	5.09	(6.22)		(3.53)
Net asset value	[1]	$ 103.34	$ 117.97	103.34	$ 117.97
Net investment income/(loss)		(2.66%)	(2.05%)		(2.00%)
Expenses before incentive fees	[2],[3]	2.74%	2.43%		2.39%
Expenses after incentive fees	[2],[3]	2.74%	2.43%		2.39%
Total return before incentive fee	[4]	5.18%	(5.27%)		(2.91%)
Total return after incentive fees	[4]	5.18%	(5.27%)		(2.91%)
Frontier Masters Fund [Member] \| Class 1 [Member]
Net asset value	[1]	$ 88.19	$ 98.30		$ 114.74
Interest income	[1]	0.03	0.10		0.19
Expenses	[1]	(2.10)	(2.19)		(4.47)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.2	3.12		(11.13)
Net income/(loss)	[1]	(0.86)	1.03		(15.41)
Net asset value	[1]	$ 87.33	$ 99.33	87.33	$ 99.33
Net investment income/(loss)		(9.40%)	(8.68%)		(8.50%)
Expenses before incentive fees	[2],[3]	9.55%	9.11%		8.87%
Expenses after incentive fees	[2],[3]	9.55%	9.11%		87.00%
Total return before incentive fee	[4]	(0.98%)	1.05%		(13.43%)
Total return after incentive fees	[4]	(0.98%)	1.05%		(13.43%)
Frontier Masters Fund [Member] \| Class 2 [Member]
Net asset value	[1]	$ 104.69	$ 114.67		$ 133.27
Interest income	[1]	0.04	0.12		0.22
Expenses	[1]	(1.68)	(1.94)		(3.94)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.05	3.53		(13.17)
Net income/(loss)	[1]	(0.59)	1.71		(16.89)
Net asset value	[1]	$ 104.1	$ 116.38	104.1	$ 116.38
Net investment income/(loss)		(6.32%)	(6.48%)		(6.26%)
Expenses before incentive fees	[2],[3]	6.48%	6.91%		6.63%
Expenses after incentive fees	[2],[3]	6.48%	6.91%		6.63%
Total return before incentive fee	[4]	(0.56%)	1.49%		(12.67%)
Total return after incentive fees	[4]	(0.56%)	1.49%		(12.97%)
Frontier Masters Fund [Member] \| Class 3 [Member]
Net asset value	[1]	$ 98.04	$ 107.10		$ 124.4
Interest income	[1]	0.04	0.11		0.09
Expenses	[1]	(1.57)	(1.81)		(1.85)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.02	3.37		(15.54)
Net income/(loss)	[1]	(0.51)	1.67		(17.30)
Net asset value	[1]	$ 97.53	$ 107.1	97.53	$ 107.1
Net investment income/(loss)		(6.32%)	(6.48%)		(6.10%)
Expenses before incentive fees	[2],[3]	6.48%	6.91%		6.42%
Expenses after incentive fees	[2],[3]	6.48%	6.91%		6.42%
Total return before incentive fee	[4]	(0.52%)	1.56%		(13.91%)
Total return after incentive fees	[4]	(0.52%)	1.56%		(13.91%)
Frontier Diversified Fund [Member] \| Class 1 [Member]
Net asset value	[1]	$ 100.84	$ 106.53		$ 116.41
Interest income	[1]	0.01	0.06		0.010
Expenses	[1]	(1.69)	(1.73)		(3.56)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.29	3.44		(4.65)
Net income/(loss)	[1]	1.6	1.77		(8.11)
Net asset value	[1]	$ 102.44	$ 108.30	102.44	$ 108.30
Net investment income/(loss)		(6.74%)	(6.27%)		(6.37%)
Expenses before incentive fees	[2],[3]	6.77%	6.50%		6.55%
Expenses after incentive fees	[2],[3]	6.77%	6.50%		6.56%
Total return before incentive fee	[4]	1.59%	1.66%		(6.96%)
Total return after incentive fees	[4]	1.59%	1.66%		(6.97%)
Frontier Diversified Fund [Member] \| Class 2 [Member]
Net asset value	[1]	$ 119.69	$ 124.26	120.84	$ 135.19
Interest income	[1]	0.01	0.07	0.05	0.12
Expenses	[1]	(1.12)	(1.07)	(2.16)	(2.23)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.53	3.61	3.38	(6.21)
Net income/(loss)	[1]	2.42	2.61	1.27	(8.32)
Net asset value	[1]	$ 122.11	$ 126.87	$ 122.11	$ 126.87
Net investment income/(loss)		(3.73%)	(3.20%)	(7.23%)	(3.33%)
Expenses before incentive fees	[2],[3]	3.76%	3.43%	7.40%	3.51%
Expenses after incentive fees	[2],[3]	3.76%	3.43%	7.40%	3.52%
Total return before incentive fee	[4]	2.02%	2.10%	1.05%	(6.14%)
Total return after incentive fees	[4]	2.02%	2.10%	1.05%	(6.15%)
Frontier Diversified Fund [Member] \| Class 3 [Member]
Net asset value	[1]	$ 111.62	$ 115.59		$ 125.68
Interest income	[1]	0.01	0.07		0.11
Expenses	[1]	(1.05)	(0.99)		(2.07)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.38	3.43		(5.63)
Net income/(loss)	[1]	2.34	2.50		(7.59)
Net asset value	[1]	$ 113.96	$ 118.09	$ 113.96	$ 118.09
Net investment income/(loss)		(3.73%)	(3.20%)		(3.33%)
Expenses before incentive fees	[2],[3]	3.76%	3.43%		3.51%
Expenses after incentive fees	[2],[3]	3.76%	3.43%		3.52%
Total return before incentive fee	[4]	2.10%	2.16%		(6.03%)
Total return after incentive fees	[4]	2.10%	2.16%		(6.04%)
Frontier Global Fund [Member] \| Class 1AP [Member]
Net asset value	[1]	$ 156.5	$ 161.61
Interest income	[1]	0	0
Expenses	[1]	(2.42)	(2.95)
Net gain/(loss) on investments, net of non-controlling interests	[1]	12.05	8.53
Net income/(loss)	[1]	9.63	5.58
Net asset value	[1]	$ 166.13	$ 167.19	166.13	$ 167.19
Net investment income/(loss)		(6.07%)	(7.20%)
Expenses before incentive fees	[2],[3]	6.07%	7.20%
Expenses after incentive fees	[2],[3]	6.07%	7.20%
Total return before incentive fee	[4]	6.15%	3.45%
Total return after incentive fees	[4]	6.15%	3.45%
Frontier Global Fund [Member] \| Class 1 [Member]
Net asset value	[1]	$ 136.33	$ 144.60
Interest income	[1]	0	0
Expenses	[1]	(3.15)	(3.72)
Net gain/(loss) on investments, net of non-controlling interests	[1]	10.46	7.78
Net income/(loss)	[1]	7.31	4.06
Net asset value	[1]	$ 143.64	$ 148.66	143.64	148.66
Net investment income/(loss)		(9.11%)	(10.21%)
Expenses before incentive fees	[2],[3]	9.11%	(10.21%)
Expenses after incentive fees	[2],[3]	9.11%	(10.21%)
Total return before incentive fee	[4]	5.36%	2.81%
Total return after incentive fees	[4]	5.36%	2.81%
Frontier Global Fund [Member] \| Class 2 [Member]
Net asset value	[1]	$ 195.48	$ 196.85
Interest income	[1]	0	0
Expenses	[1]	(3.02)	(3.59)
Net gain/(loss) on investments, net of non-controlling interests	[1]	15.02	10.21
Net income/(loss)	[1]	12	6.62
Net asset value	[1]	$ 207.48	$ 203.47	$ 207.48	$ 203.47
Net investment income/(loss)		(6.07%)	(7.20%)
Expenses before incentive fees	[2],[3]	6.07%	7.20%
Expenses after incentive fees	[2],[3]	6.07%	7.20%
Total return before incentive fee	[4]	6.14%	3.36%
Total return after incentive fees	[4]	6.14%	3.36%

[1]	Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information.
[2]	Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.
[3]	Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6.
[4]	Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized.

Financial Highlights (Frontier

Financial Highlights (Frontier Funds) (Details) - Frontier Fund [Member]		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Ratios to average net assets
Net investment income/(loss)	[1]	(5.41%)	(5.90%)	(5.57%)	(6.03%)
Expenses before incentive fees	[1],[2],[3]	5.52%	6.14%	(5.77%)	6.12%
Expenses after incentive fees	[1],[2],[3]	5.52%	6.14%	(5.77%)	6.27%
Total return before incentive fees	[4]	2.74%	0.49%	1.04%	(9.74%)
Total return after incentive fees	[4]	2.74%	0.49%	1.04%	(9.89%)

[1]	Annualized with the exception of incentive fees.
[2]	Does not include management and incentive fees at Galaxy Plus.
[3]	Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5.
[4]	Total returns are not annualized.

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - Frontier Balanced Fund [Member] - Number	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Numbers of Instruments Bought	228	174	480	1,522
Derivative Numbers of Instruments Sold	275	301	581	1,518

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - Frontier Balanced Fund [Member] - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Realized trading income/(loss)		$ (1,375,164)	$ (60,632)	$ 1,078,230	$ (2,774,078)
Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	253,372	(257,661)	257,898	(283,336)
Agriculturals [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	64,042	(46,019)	18,952	(97,212)
Currencies [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(123,270)	(222,765)	(241,334)	(199,028)
Energies [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(7,996)	19,021	(37,678)	61,256
Interest rates [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	312,541	22,712	548,174	50,782
Metals [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	13,674	(10,368)	8,700	(105,544)
Stock indices [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	$ (5,618)	$ (20,242)	$ (38,915)	$ 6,410

[1]	Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures, forwards, and options.

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member] - Frontier Balanced Fund [Member] - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Change in unrealized trading income/(loss)		$ 2,097,671	$ 1,467,490	$ (151,975)	$ 248,402
Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(94,279)	(187,927)	(196,516)	77,662
Agriculturals [Member] \| Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(17,348)	9,429	(41,639)	23,123
Currencies [Member] \| Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	16,367	(61,638)	57,496	(101,406)
Energies [Member] \| Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(7,260)	(5,285)	1,510	(51,468)
Interest rates [Member] \| Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(99,664)	(84,319)	(107,355)	(43,085)
Metals [Member] \| Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	4,519	(36,616)	6,931	112,053
Stock indices [Member] \| Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	$ 9,106	$ (9,498)	$ 1,534	$ (16,876)

[1]	Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit).

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 3) - The Series of the Frontier Funds [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Frontier Balanced Fund [Member] \| Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 242,957	$ 348,879
Gross Amounts offset in the Statements of Financial	(201,096)	(128,220)
Net Amounts Presented in the Statements of Financial Condition	41,861	220,659
Frontier Balanced Fund [Member] \| Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	10,691,012	10,794,908
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	10,691,012	10,794,908
Frontier Diversified Fund [Member] \| Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	5,881,358	5,920,414
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	5,881,358	5,920,414
Frontier Long/Short Commodity Fund [Member] \| Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	435,091	479,102
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	435,091	479,102
Frontier Heritage Fund [Member] \| Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	3,036,673	2,955,444
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 3,036,673	$ 2,955,444

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details Textual) - The Series of the Frontier Funds [Member]	Jun. 30, 2019	Dec. 31, 2018
Minimum [Member]
Derivative Instruments and Hedging Activities (Series of Frontier Funds) (Textual)
Percentage of embedded management fees	1.00%	1.00%
Percentage of fair value of swaps and embedded incentive fees	15.00%	15.00%
Maximum [Member]
Derivative Instruments and Hedging Activities (Series of Frontier Funds) (Textual)
Percentage of embedded management fees	1.50%	1.50%
Percentage of fair value of swaps and embedded incentive fees	25.00%	25.00%

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities (Frontier Funds) (Details) - Frontier Fund [Member] - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Realized trading income/(loss)		$ (1,348,034)	$ (365,678)	$ 3,796,872	$ (5,545,458)
Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	178,497	715,860	(1,098,852)	(38,891)
Agriculturals [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	64,042	110,822	4,479	286,692
Currencies [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(190,296)	(735,456)	(690,957)	(1,063,187)
Energies [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(7,996)	1,237,113	(592,892)	972,529
Interest rates [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	312,541	154,718	865,211	(9,340)
Metals [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	5,826	132,403	(611,514)	(46,591)
Stock indices [Member] \| Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	$ (5,618)	$ (183,740)	$ (73,178)	$ (178,994)

[1]	Amounts recorded in the Consolidated Statements of Operations under Net realized gain(loss) on futures forwards and options.

Derivative Instruments and He_9

Derivative Instruments and Hedging Activities (Frontier Funds) (Details 1) - Frontier Fund [Member] - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Change in unrealized trading income/(loss)		$ 4,103,867	$ 1,990,501	$ 440,067	$ (262,192)
Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(19,404)	249,677	506,148	(514,240)
Agriculturals [Member] \| Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(17,348)	206,966	(96,927)	(382,688)
Currencies [Member] \| Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	83,394	(9,676)	170,634	(278,092)
Energies [Member] \| Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	589	(90,184)	221,638	(61,956)
Interest rates [Member] \| Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(996,664)	(21,184)	(334,017)	21,007
Metals [Member] \| Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	4,519	72,443	488,974	384,926
Stock indices [Member] \| Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	$ 9,106	$ 91,312	$ 55,845	$ (197,437)

[1]	Amounts recorded in the Consolidated Statements of Operations under Net change in open trade equity/(deficit)

Derivative Instruments and H_10

Derivative Instruments and Hedging Activities (Frontier Funds) (Details 2) - Frontier Fund [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 242,957	$ 3,244,057
Gross Amounts offset in the Statements of Financial	(201,096)	(3,642,246)
Net Amounts Presented in the Statements of Financial Condition	41,861	(398,189)
Swap [Member]
Gross Amounts of recognized Derivative Assets	20,044,944	20,149,868
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 20,044,944	$ 20,149,868

Derivative Instruments and H_11

Derivative Instruments and Hedging Activities (Frontier Funds) (Details Textual) - Frontier Fund [Member] - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivative Instruments and Hedging Activities (Frontier Funds) (Textual)
Monthly average of forwards, options and futures contracts bought	$ 230	$ 707
Monthly average of forwards, options and futures contracts sold	$ 277	$ 613
Minimum [Member]
Derivative Instruments and Hedging Activities (Frontier Funds) (Textual)
Percentage of embedded management fees	1.00%		1.00%
Percentage of fair value of swaps and embedded incentive fees	15.00%		15.00%
Maximum [Member]
Derivative Instruments and Hedging Activities (Frontier Funds) (Textual)
Percentage of embedded management fees	1.50%		1.50%
Percentage of fair value of swaps and embedded incentive fees	25.00%		25.00%

Trading Activities and Relate_2

Trading Activities and Related Risks (The Series of the Frontier Funds) (Details)	6 Months Ended
	Jun. 30, 2019
The Series of the Frontier Funds [Member]
Trading Activities and Related Risks (Textual)
Trading activities and related risks ,description	If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor?s portfolio. It is anticipated that any Trading Advisor?s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.

Trading Activities and Relate_3

Trading Activities and Related Risks (Frontier Funds) (Details)	6 Months Ended
	Jun. 30, 2019
Frontier Fund [Member]
Trading Activities and Related Risks (Frontier Funds) (Textual)
Description of trading activities and related risks	If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor's portfolio. It is anticipated that any Trading Advisor's margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.

Subsequent Events (The Series o

Subsequent Events (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - Subsequent Event [Member]	2 Months Ended
	Aug. 31, 2019USD ($)
Frontier Balanced Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	$ 902,280
Frontier Diversified Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	308,070
Frontier Heritage Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	59,320
Frontier Long/Short Commodity Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	28,409
Frontier Masters Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	121,292
Frontier Select Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	121,641
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	$ 119,800

Subsequent Events (Frontier Fun

Subsequent Events (Frontier Funds) (Details)	1 Months Ended
Subsequent Events (Frontier Funds) (Details)	Aug. 14, 2019USD ($)
The Trust [Member] \| Frontier Funds [Member] \| Subsequent Event [Member]
Subsequent Events (Frontier Funds) (Textual)
Paid in redemptions	$ 1,660,812