Frontier Funds 10-Q 13 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 30, 2019shares
Document And Entity Information
Entity Registrant Name	Frontier Funds
Entity Central Index Key	0001261379
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity File Number	000-51274
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	0
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019

Statements of Financial Conditi

Statements of Financial Condition (unaudited) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 290,251	$ 1,729,879
U.S. Treasury securities, at fair value	1,878,458	5,684,327
Receivable from futures commission merchants	2,861,257	11,255,848
Open trade equity, at fair value	25,184
Incentive fees receivable		78,845
Swap contracts, at fair value	20,646,071	20,149,868
Investments in private investment companies, at fair value	40,090,751	46,557,428
Interest receivable	12,732	117,168
Due from Managing Owner	93,696
Receivable from related parties	11,453
Redemptions receivable from private investment companies	552,017
Other assets	6,230
Total Assets	66,468,100	85,573,363
LIABILITIES
Open trade deficit, at fair value		398,189
Owner redemptions payable	23,782	23,759
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner	8,669	78,045
Interest payable to Managing Owner	1,243	10,852
Trading fees payable to Managing Owner	187,827	222,241
Service fees payable to Managing Owner	72,809	96,152
Risk analysis fees payable	9,429	27,562
Advance on unrealized swap appreciation	12,191,555	12,191,555
Subscriptions in advance for service fee rebates	677,124	497,326
Other liabilities	21,013	4,003
Total Liabilities	13,193,451	13,560,581
CAPITAL
Managing Owner Units	603,024	851,595
Limited Owner Units	52,671,625	71,161,187
Total Owners' Capital	53,274,649	72,012,782
Total Liabilities and Owners Capital	66,468,100	85,573,363
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
ASSETS
Cash and cash equivalents	29,630	472,695
U.S. Treasury securities, at fair value	191,764	1,553,261
Incentive fees receivable		17,277
Swap contracts, at fair value	6,074,428	5,920,414
Investments in private investment companies, at fair value	9,854,708	11,084,463
Investments in unconsolidated trading companies, at fair value	14,595	1,160,910
Interest receivable	1,300	32,017
Due from Managing Owner	93,696
Redemptions receivable from private investment companies	171,906
Other assets	6,232
Total Assets	16,449,712	20,241,037
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner		3,875
Trading fees payable to Managing Owner	40,014	44,827
Service fees payable to Managing Owner	2,215	4,498
Advance on unrealized swap appreciation	4,000,000	4,000,000
Subscriptions in advance for service fee rebates	117,449	20,430
Other liabilities
Total Liabilities	4,159,678	4,084,527
CAPITAL
Total Owners' Capital	12,290,034	16,156,510
Non-Controlling Interests
Total Capital	12,290,034	16,156,510
Total Liabilities and Owners Capital	16,449,712	20,241,037
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	3,058	3,005
Limited Owner Units	$ 5,740,836	$ 7,669,749
Units Outstanding	46,705	63,494
Net Asset Value per Unit	$ 122.98	$ 120.84
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member] | Class 3 [Member]
CAPITAL
Managing Owner Units	135,740	172,426
Limited Owner Units	$ 5,086,348	$ 6,607,774
Units Outstanding	45,471	60,202
Net Asset Value per Unit	$ 114.84	$ 112.62
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member] | Class 3a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 1,324,052	$ 1,703,556
Units Outstanding	12,890	16,661
Net Asset Value per Unit	$ 102.72	$ 102.25
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member] | Class 1a [Member]
CAPITAL
Limited Owner Units
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
ASSETS
Cash and cash equivalents	19,939	46,374
U.S. Treasury securities, at fair value	129,040	152,384
Incentive fees receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	2,583,002	4,661,327
Investments in unconsolidated trading companies, at fair value	9,821	775,088
Interest receivable	875	3,141
Due from Managing Owner
Redemptions receivable from private investment companies
Other assets
Total Assets	2,742,677	5,638,314
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner		8,347
Trading fees payable to Managing Owner	16,907	27,984
Service fees payable to Managing Owner	117	1,750
Advance on unrealized swap appreciation
Subscriptions in advance for service fee rebates	31,758	28,100
Other liabilities	381
Total Liabilities	49,163	66,181
CAPITAL
Total Owners' Capital	2,693,513	5,572,133
Non-Controlling Interests
Total Capital	2,693,513	5,572,133
Total Liabilities and Owners Capital	2,742,676	5,638,314
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	16,078	51,365
Limited Owner Units	$ 977,780	$ 1,241,610
Units Outstanding	9,768	12,008
Net Asset Value per Unit	$ 101.75	$ 107.68
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member] | Class 3 [Member]
CAPITAL
Managing Owner Units	18,951	20,019
Limited Owner Units	$ 1,665,706	$ 2,774,661
Units Outstanding	17,661	27,734
Net Asset Value per Unit	$ 95.39	$ 100.77
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member] | Class 3a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 14,998	$ 1,484,478
Units Outstanding	177	16,296
Net Asset Value per Unit	$ 84.73	$ 91.10
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member] | Class 1a [Member]
CAPITAL
Limited Owner Units
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
ASSETS
Cash and cash equivalents	24,761	$ 61,600
U.S. Treasury securities, at fair value	160,246	202,415
Incentive fees receivable		60,871
Swap contracts, at fair value	384,138	479,102
Investments in private investment companies, at fair value	1,407,335	1,729,241
Investments in unconsolidated trading companies, at fair value	12,196	28,163
Interest receivable	1,086	4,172
Due from Managing Owner
Redemptions receivable from private investment companies
Other assets
Total Assets	1,989,762	2,565,564
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner
Trading fees payable to Managing Owner	4,590	5,306
Service fees payable to Managing Owner		51
Advance on unrealized swap appreciation	115,000	115,000
Subscriptions in advance for service fee rebates	163
Other liabilities	474
Total Liabilities	120,190	120,357
CAPITAL
Total Owners' Capital	1,869,572	2,445,207
Non-Controlling Interests
Total Capital	1,869,572	2,445,207
Total Liabilities and Owners Capital	1,989,762	2,565,564
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	4,928	5,998
Limited Owner Units	$ 39,718	$ 78,098
Units Outstanding	503	851
Net Asset Value per Unit	$ 88.76	$ 98.82
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units	$ 13,696	$ 20,484
Limited Owner Units	$ 79,251	$ 165,985
Units Outstanding	1,651	2,803
Net Asset Value per Unit	$ 56.30	$ 66.52
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member] | Class 3 [Member]
CAPITAL
Managing Owner Units
Limited Owner Units	$ 1,468,084	$ 1,791,417
Units Outstanding	15,759	17,282
Net Asset Value per Unit	$ 93.16	$ 103.66
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member] | Class 3a [Member]
CAPITAL
Managing Owner Units	$ 1,063	$ 1,253
Limited Owner Units	$ 250,513	$ 361,921
Units Outstanding	4,247	5,201
Net Asset Value per Unit	$ 59.24	$ 69.83
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member] | Class 1a [Member]
CAPITAL
Limited Owner Units	$ 12,319	$ 20,051
Units Outstanding	259	353
Net Asset Value per Unit	$ 47.56	$ 56.80
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 49,080	$ 37,556
U.S. Treasury securities, at fair value	317,639	123,409
Receivable from futures commission merchants	2,861,257	2,683,299
Open trade equity, at fair value	25,184	220,659
Swap contracts, at fair value	11,149,055	10,794,908
Investments in private investment companies, at fair value	15,087,718	22,854,326
Investments in unconsolidated trading companies, at fair value	24,175	1,744,999
Interest receivable	2,153	2,544
Redemptions receivable from private investment companies	380,111
Other assets
Total Assets	29,896,372	38,461,700
LIABILITIES
Owner redemptions payable	16,572	23,759
Management fees payable to Managing Owner	8,669	13,917
Interest payable to Managing Owner	246	1,490
Trading fees payable to Managing Owner	76,517	101,770
Service fees payable to Managing Owner	42,253	56,791
Risk analysis fees payable	9,429	9,127
Advance on unrealized swap appreciation	6,176,555	6,176,555
Subscriptions in advance for service fee rebates	308,541	258,194
Other liabilities	1,019
Total Liabilities	6,639,801	6,641,603
CAPITAL
Total Owners' Capital	23,256,571	31,820,097
Non-Controlling Interests
Total Capital	23,256,571	31,820,097
Total Liabilities and Owners Capital	29,896,372	38,461,700
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	82,176	125,021
Limited Owner Units	$ 3,268,230	$ 4,403,354
Units Outstanding	18,210	25,027
Net Asset Value per Unit	$ 183.56	$ 180.94
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units	$ 183,958	$ 251,097
Limited Owner Units	$ 43,513	$ 88,076
Units Outstanding	1,430	2,163
Net Asset Value per Unit	$ 159.07	$ 156.81
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member] | Class 3a [Member]
CAPITAL
Limited Owner Units	$ 889,635	$ 893,515
Units Outstanding	5,611	5,718
Net Asset Value per Unit	$ 158.55	$ 156.26
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 18,453,993	$ 25,703,922
Units Outstanding	158,151	218,514
Net Asset Value per Unit	$ 116.69	$ 117.63
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 335,066	$ 355,112
Units Outstanding	2,458	2,647
Net Asset Value per Unit	$ 136.10	$ 134.16
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 65,947	$ 25,072
U.S. Treasury securities, at fair value	426,797	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	2,579,201	3,252,075
Investments in unconsolidated trading companies, at fair value	584,445	523,180
Interest receivable	2,893	1,698
Redemptions receivable from private investment companies
Other assets
Total Assets	3,659,283	3,884,411
LIABILITIES
Owner redemptions payable
Management fees payable to Managing Owner
Interest payable to Managing Owner	282
Trading fees payable to Managing Owner	7,443	7,812
Service fees payable to Managing Owner	8,387	8,575
Risk analysis fees payable
Advance on unrealized swap appreciation
Subscriptions in advance for service fee rebates	15,722	11,162
Other liabilities	8,572
Total Liabilities	40,406	27,549
CAPITAL
Total Owners' Capital	3,618,877	3,856,862
Non-Controlling Interests
Total Capital	3,618,877	3,856,862
Total Liabilities and Owners Capital	3,659,283	3,884,411
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	39,892	46,368
Limited Owner Units	$ 70,625	$ 99,467
Units Outstanding	917	1,348
Net Asset Value per Unit	$ 120.52	$ 108.18
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 3,495,798	$ 3,709,130
Units Outstanding	44,957	51,939
Net Asset Value per Unit	$ 77.76	$ 71.41
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 12,562	$ 1,897
Units Outstanding	138	23
Net Asset Value per Unit	$ 91.03	$ 82.48
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 20,732	$ 951,485
U.S. Treasury securities, at fair value	134,173	3,126,551
Incentive fees receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	6,195,255
Investments in unconsolidated trading companies, at fair value	10,212	4,292,075
Interest receivable	909	64,446
Total Assets	6,361,281	8,434,557
LIABILITIES
Owner redemptions payable
Management fees payable to Managing Owner		42,705
Interest payable to Managing Owner	278	8,124
Trading fees payable to Managing Owner	29,967	24,353
Service fees payable to Managing Owner	13,503	17,803
Subscriptions in advance for service fee rebates	148,147	133,281
Subscriptions payable to private investment companies
Other liabilities	8,402
Total Liabilities	200,297	226,266
CAPITAL
Total Owners' Capital	6,160,984	8,208,291
Total Capital	6,160,984	8,208,291
Total Liabilities and Owners Capital	6,361,281	8,434,557
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	66,939	107,598
Limited Owner Units	$ 336,313	$ 313,167
Units Outstanding	1,823	2,248
Net Asset Value per Unit	$ 221.20	$ 187.17
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 5,719,820	$ 7,755,444
Units Outstanding	37,625	58,946
Net Asset Value per Unit	$ 152.02	$ 131.57
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 37,912	$ 32,082
Units Outstanding	214	214
Net Asset Value per Unit	$ 177.16	$ 149.92
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 80,162	$ 135,096
U.S. Treasury securities, at fair value	518,799	443,921
Incentive fees receivable		697
Swap contracts, at fair value	3,038,450	2,955,444
Investments in private investment companies, at fair value	2,240,566	2,167,879
Investments in unconsolidated trading companies, at fair value	39,484	726,686
Interest receivable	3,516	9,150
Total Assets	5,920,977	6,438,873
LIABILITIES
Owner redemptions payable	7,210
Management fees payable to Managing Owner		9,201
Interest payable to Managing Owner	474	1,238
Trading fees payable to Managing Owner	12,389	10,189
Service fees payable to Managing Owner	6,334	6,684
Advance on unrealized swap appreciation	1,900,000	1,900,000
Subscriptions in advance for service fee rebates	55,344	46,159
Subscriptions payable to private investment companies
Other liabilities	2,165
Total Liabilities	1,983,916	1,973,471
CAPITAL
Total Owners' Capital	3,385,098	3,953,684
Non-Controlling Interests	551,963	511,718
Total Capital	3,937,061	4,465,402
Total Liabilities and Owners Capital	5,920,977	6,438,873
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	36,545	46,961
Limited Owner Units	$ 570,196	$ 573,992
Units Outstanding	3,438	4,071
Net Asset Value per Unit	$ 176.48	$ 152.53
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 2,768,782	$ 3,331,725
Units Outstanding	24,518	33,374
Net Asset Value per Unit	$ 112.93	$ 99.83
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 9,575	$ 1,006
Units Outstanding	73	9
Net Asset Value per Unit	$ 131.16	$ 111.78

Condensed Schedule of Investmen

Condensed Schedule of Investments (unaudited) - USD ($)		Sep. 30, 2019		Dec. 31, 2018
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 6,074,428
Investment Owned, % of Total Capital (Net Asset Value)	[1]	49.43%
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	[1]	$ 6,074,428
Investment Owned, % of Total Capital (Net Asset Value)	[1]	49.43%
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	[2]	$ 9,854,708
Investment Owned, % of Total Capital (Net Asset Value)	[2]	80.18%
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	[2]	$ 511,734
Investment Owned, % of Total Capital (Net Asset Value)	[2]	4.16%
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	[2]	$ 1,298,067
Investment Owned, % of Total Capital (Net Asset Value)	[2]	10.56%
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]	$ 2,230,203
Investment Owned, % of Total Capital (Net Asset Value)	[2]	18.15%
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	[2]	$ 1,164,118
Investment Owned, % of Total Capital (Net Asset Value)	[2]	9.48%
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	[2]	$ 515,537
Investment Owned, % of Total Capital (Net Asset Value)	[2]	4.19%
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	[2]	$ 1,904,964
Investment Owned, % of Total Capital (Net Asset Value)	[2]	15.50%
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]	$ 2,067,148
Investment Owned, % of Total Capital (Net Asset Value)	[2]	16.82%
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)	[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	[2]	$ 161,937
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.32%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 14,595
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.12%
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	[2]	$ 14,595
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.12%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 191,764
Investment Owned, % of Total Capital (Net Asset Value)	[3]	1.56%
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]	$ 191,764
Investment Owned, % of Total Capital (Net Asset Value)	[3]	1.56%
Investment Owned, Underlying Face Amount, at Face Value	[4]	$ 1,255,000
Investment Owned, at Cost	[4]	1,606,935
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]	148,024
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]	191,986
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	148,024
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	191,986
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	[2]	$ 2,583,002
Investment Owned, % of Total Capital (Net Asset Value)	[2]	95.90%
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	[2]	$ 204,432
Investment Owned, % of Total Capital (Net Asset Value)	[2]	7.59%
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 - 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	[2]	$ 1,126,623
Investment Owned, % of Total Capital (Net Asset Value)	[2]	41.38%
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	[2]	$ 692,098
Investment Owned, % of Total Capital (Net Asset Value)	[2]	25.69%
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	[2]	$ 559,849
Investment Owned, % of Total Capital (Net Asset Value)	[2]	27.79%
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	[2]	$ 9,821
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.36%
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	[2]	$ 9,821
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.36%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 129,040
Investment Owned, % of Total Capital (Net Asset Value)	[3]	4.79%
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]	$ 129,040
Investment Owned, % of Total Capital (Net Asset Value)	[3]	4.79%
Investment Owned, Underlying Face Amount, at Face Value	[4]	$ 1,255,000
Investment Owned, at Cost	[4]	1,606,935
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]	99,607
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]	129,189
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	99,607
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	129,189
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 384,138
Investment Owned, % of Total Capital (Net Asset Value)	[1]	20.55%
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	[1]	$ 384,138
Investment Owned, % of Total Capital (Net Asset Value)	[1]	20.55%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 1,407,335
Investment Owned, % of Total Capital (Net Asset Value)	[2]	75.28%
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	[2]	$ 163,343
Investment Owned, % of Total Capital (Net Asset Value)	[2]	8.74%
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 - 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	[2]	$ 494,670
Investment Owned, % of Total Capital (Net Asset Value)	[2]	26.46%
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	[2]	$ 749,323
Investment Owned, % of Total Capital (Net Asset Value)	[2]	40.08%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 12,196
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.65%
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	[2]	$ 12,196
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.65%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 160,246
Investment Owned, % of Total Capital (Net Asset Value)	[3]	8.57%
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]	$ 160,246
Investment Owned, % of Total Capital (Net Asset Value)	[3]	8.57%
Investment Owned, Underlying Face Amount, at Face Value	[4]	$ 1,255,000
Investment Owned, at Cost	[4]	1,606,935
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]	123,696
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]	160,432
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	123,696
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	160,432
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 11,149,055
Investment Owned, % of Total Capital (Net Asset Value)	[1]	47.94%
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	[1]	$ 11,149,055
Investment Owned, % of Total Capital (Net Asset Value)	[1]	47.94%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 15,087,718
Investment Owned, % of Total Capital (Net Asset Value)	[2]	64.87%
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	[2]	$ 737,086
Investment Owned, % of Total Capital (Net Asset Value)	[2]	3.17%
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	[2]	$ 1,947,902
Investment Owned, % of Total Capital (Net Asset Value)	[2]	8.38%
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	[2]	$ 2,914,696
Investment Owned, % of Total Capital (Net Asset Value)	[2]	12.53%
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]	$ 2,022,849
Investment Owned, % of Total Capital (Net Asset Value)	[2]	8.70%
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	[2]	$ 567,509
Investment Owned, % of Total Capital (Net Asset Value)	[2]	2.44%
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	[2]	$ 367,820
Investment Owned, % of Total Capital (Net Asset Value)	[2]	13.19%
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	[2]	$ 3,543,014
Investment Owned, % of Total Capital (Net Asset Value)	[2]	15.23%
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)	[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	[2]	$ 286,842
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.23%
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	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 24,175
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.10%
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	[2]	$ 24,175
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.10%
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	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[4]	$ 317,639
Investment Owned, % of Total Capital (Net Asset Value)	[4]	1.37%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities [Member] | Additional [Member]
Investment Owned, Fair Value		$ 245,188
Investment Owned, at Cost	[4]	318,007
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[4]	$ 317,639
Investment Owned, % of Total Capital (Net Asset Value)	[4]	1.37%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,255,000
Investment Owned, at Cost		1,606,935
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		245,188
Investment Owned, at Cost	[4]	318,007
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[3]	$ 23,922
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.11%
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	[3]	$ 1,300
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.01%
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	[3]	$ 2,224
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.01%
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	[3]	$ (4,349)
Investment Owned, % of Total Capital (Net Asset Value)	[3]	(0.02%)
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]	$ 3,370
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.01%
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	[3]	$ 10,546
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.05%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Far East) [Member]
Investment Owned, Fair Value		$ (1,064)
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		$ (3,560)
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		$ 18,570
Investment Owned, % of Total Capital (Net Asset Value)		0.08%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[3]	$ 4,353
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.02%
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	[3]	$ (8,640)
Investment Owned, % of Total Capital (Net Asset Value)	[3]	(0.04%)
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	[3]	$ 7,329
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.03%
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	[3]	$ 595
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[3]	$ 1,472
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.01%
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		$ (644)
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 Stock Index Futures Contracts (Africa) [Member]
Investment Owned, Fair Value		$ 1,895
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 Soft Futures Contracts (Far East) [Member]
Investment Owned, Fair Value		$ 2,346
Investment Owned, % of Total Capital (Net Asset Value)		0.01%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[3]	$ (3,091)
Investment Owned, % of Total Capital (Net Asset Value)	[3]	(0.01%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member] | Various Currency Forwards Contracts (NA) [Member]
Investment Owned, Fair Value	[3]	$ (3,091)
Investment Owned, % of Total Capital (Net Asset Value)	[3]	(0.01%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[3]	$ 25,184
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.12%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]	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	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 2,579,201
Investment Owned, % of Total Capital (Net Asset Value)	[2]	71.27%
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 - 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	[2]	$ 989,078
Investment Owned, % of Total Capital (Net Asset Value)	[2]	27.33%
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	[2]	$ 1,590,123
Investment Owned, % of Total Capital (Net Asset Value)	[2]	43.94%
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] | 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] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 584,445
Investment Owned, % of Total Capital (Net Asset Value)	[2]	16.15%
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	[2]	$ 32,482
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.90%
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	[2]	$ 551,963
Investment Owned, % of Total Capital (Net Asset Value)	[2]	15.25%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[4]	$ 426,797
Investment Owned, % of Total Capital (Net Asset Value)	[4]	11.79%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities [Member] | Additional [Member]
Investment Owned, Fair Value		$ 329,449
Investment Owned, at Cost	[4]	427,292
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[4]	$ 426,797
Investment Owned, % of Total Capital (Net Asset Value)	[4]	11.79%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,255,000
Investment Owned, at Cost		1,606,935
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		329,449
Investment Owned, at Cost	[4]	427,292
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%
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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index 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 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] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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 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] | SHORT 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 Select Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	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	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%
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	[2]	$ 6,195,255
Investment Owned, % of Total Capital (Net Asset Value)	[2]	100.56%
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		$ 6,195,255
Investment Owned, % of Total Capital (Net Asset Value)		100.56%
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	[2]	$ 10,212
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.17%
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	[2]	$ 10,212
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.17%
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[4]	$ 134,173
Investment Owned, % of Total Capital (Net Asset Value)	[4]	2.18%
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	[4]	$ 103,570
Investment Owned, at Cost	[4]	134,329
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	[4]	$ 134,173
Investment Owned, % of Total Capital (Net Asset Value)	[4]	2.18%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,255,000
Investment Owned, at Cost		1,606,935
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	[4]	103,570
Investment Owned, at Cost	[4]	134,329
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 3,038,450
Investment Owned, % of Total Capital (Net Asset Value)	[1]	77.18%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member] | Frontier Brevan Howard Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 3,038,450
Investment Owned, % of Total Capital (Net Asset Value)	[1]	77.18%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 2,240,566
Investment Owned, % of Total Capital (Net Asset Value)	[2]	56.91%
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]	$ 1,251,598
Investment Owned, % of Total Capital (Net Asset Value)	[2]	31.79%
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	[2]	$ 988,968
Investment Owned, % of Total Capital (Net Asset Value)	[2]	25.12%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 39,484
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.00%
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	[2]	$ 39,484
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.00%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[4]	$ 518,799
Investment Owned, % of Total Capital (Net Asset Value)	[4]	13.18%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities [Member] | Additional [Member]
Investment Owned, Fair Value	[4]	$ 400,466
Investment Owned, at Cost	[4]	519,400
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[4]	$ 518,799
Investment Owned, % of Total Capital (Net Asset Value)	[4]	13.18%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,255,000
Investment Owned, at Cost		1,606,935
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	[4]	400,466
Investment Owned, at Cost	[4]	519,400
Frontier Funds [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[5]	$ 25,184		$ (398,189)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.01%		(0.56%)
Frontier Funds [Member] | Swap [Member]
Investment Owned, Fair Value	[6]	$ 20,646,071		$ 20,149,868
Investment Owned, % of Total Capital (Net Asset Value)	[6]	38.75%		27.98%
Frontier Funds [Member] | Swap [Member] | Frontier XXXV Diversified Select Swap (U.S.) [Member]
Investment Owned, Fair Value		$ 6,074,428		$ 5,920,414	[6]
Investment Owned, % of Total Capital (Net Asset Value)		11.40%		8.22%	[6]
Frontier Funds [Member] | Swap [Member] | Frontier XXXVII L/S Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[6]	$ 384,138		$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[6]	0.72%		0.67%
Frontier Funds [Member] | Swap [Member] | Frontier XXXIV Balanced Select Swap (U.S.) [Member]
Investment Owned, Fair Value		$ 11,149,055		$ 10,794,908	[6]
Investment Owned, % of Total Capital (Net Asset Value)		20.93%		14.99%	[6]
Frontier Funds [Member] | Swap [Member] | Frontier Brevan Howard Swap (U.S.) [Member]
Investment Owned, Fair Value		$ 3,038,450		$ 2,955,444	[6]
Investment Owned, % of Total Capital (Net Asset Value)		5.70%		4.10%	[6]
Frontier Funds [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value		$ 40,090,751	[2]	$ 46,557,428	[7]
Investment Owned, % of Total Capital (Net Asset Value)		75.25%	[2]	64.64%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		$ 1,616,594	[2]	$ 3,308,411	[7]
Investment Owned, % of Total Capital (Net Asset Value)		3.03%	[2]	4.59%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		$ 3,245,969	[2]	$ 3,003,247	[7]
Investment Owned, % of Total Capital (Net Asset Value)		6.09%	[2]	4.17%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		$ 5,144,899	[2]	$ 4,981,003	[7]
Investment Owned, % of Total Capital (Net Asset Value)		9.66%	[2]	6.92%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value		$ 3,187,967	[2]	$ 4,968,683	[7]
Investment Owned, % of Total Capital (Net Asset Value)		5.98%	[2]	6.90%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		$ 1,083,046	[2]	$ 930,806	[7]
Investment Owned, % of Total Capital (Net Asset Value)		2.03%	[2]	1.29%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		$ 13,546,261	[2]	$ 1,103,278	[7]
Investment Owned, % of Total Capital (Net Asset Value)		25.43%	[2]	1.53%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 8,774,976	[2]	$ 18,370,991	[7]
Investment Owned, % of Total Capital (Net Asset Value)		16.47%	[2]	25.51%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		$ 2,149,972	[2]	$ 2,595,925	[7]
Investment Owned, % of Total Capital (Net Asset Value)		4.04%	[2]	3.60%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		$ 1,198,102	[2]	$ 983,147	[7]
Investment Owned, % of Total Capital (Net Asset Value)		2.25%	[2]	1.37%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[7]			$ 5,503,821
Investment Owned, % of Total Capital (Net Asset Value)	[7]			7.64%
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC [Member]
Investment Owned, Fair Value		$ 142,965	[2]	$ 808,116	[7]
Investment Owned, % of Total Capital (Net Asset Value)		0.27%	[2]	1.12%	[7]
Frontier Funds [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 1,878,458		$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)		3.53%		7.89%
Frontier Funds [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		$ 1,878,458		$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)		3.53%		7.89%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,450,000		$ 4,512,000
Investment Owned, at Cost		1,880,635		5,589,456
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value		$ 23,922	[6]	$ 611,466	[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.03%	[6]	(0.85%)	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 1,300	[6]	$ 9,510	[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[6]	0.01%	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ (3,115)		$ (429,385)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.01%)		(0.60%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value		$ 2,224	[6]	$ 360,817	[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[6]	0.50%	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Investment Owned, Fair Value		$ (4,349)	[6]	$ 36,092	[5]
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)	[6]	0.50%	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value		$ 3,370	[6]	$ 78,270	[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.01%	[6]	0.11%	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 10,546	[6]	$ (20,705)	[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.02%	[6]	(0.03%)	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ (1,315)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[6]	$ (3,115)
Investment Owned, % of Total Capital (Net Asset Value)	[6]	(0.01%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (3,560)	[6]	$ (75,392)	[5]
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)	[6]	(0.10%)	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]	$ (1,064)		$ (23,446)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%		0.03%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Precious Metal Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 18,570
Investment Owned, % of Total Capital (Net Asset Value)	[5]	3.00%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Latin America) [Member]
Investment Owned, Fair Value	[5]			$ 42,160
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.06%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Energy Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (643,321)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.89%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Canada) [Member]
Investment Owned, Fair Value	[5]			$ 13,487
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.02%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 44,250
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.06%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Precious Metal Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 14,730
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.02%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ (18,456)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.03%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]			$ 1,338
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[5]	$ 4,353		$ 210,570
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.01%)		0.29%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ (8,640)		$ 81,243
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.02%)		0.11%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 7,329		$ 147,521
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.01%		0.20%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ (79,801)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.11%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]			$ (309)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 595		$ 22,291
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%		0.03%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]	$ 1,472		$ 400
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%		0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ (644)		$ 62,711
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%		0.09%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]			$ 283
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value	[5]			$ 3,027
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Africa) [Member]
Investment Owned, Fair Value	[5]	$ 1,895		$ (1,220)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%		0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]	$ 2,346
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Energy Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 425,052
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.59%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (35,688)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.05%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Precious Metal Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (226,300)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.31%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ 12,826
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.02%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Canada) [Member]
Investment Owned, Fair Value	[5]			$ 9,817
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.01%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ (63,875)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.09%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]			$ (180,813)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.25%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]			$ 43,405
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.05%
Frontier Funds [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[5]	$ (3,091)		$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.01%)		0.00%
Frontier Funds [Member] | CURRENCY FORWARDS [Member] | Various Currency Forwards Contracts (NA) [Member]
Investment Owned, Fair Value	[5]	$ (3,091)		$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.01%)		0.00%
[1]	See Note 4 to the Financial Statements.
[2]	See Note 5 to the Financial Statements.
[3]	Except for those items disclosed, no individual futures, or forwards position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.
[4]	See Note 2 to the Financial Statements.
[5]	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.
[6]	See Notes to Consolidated Financial Statements, Note 4.
[7]	See Notes to Consolidated Financial Statements, Note 5.

Statements of Operations (unaud

Statements of Operations (unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Frontier Funds [Member]
Investment income:
Interest - net	$ 16,077	$ 58,726	$ 76,983	$ 175,283
Total Income	16,077	58,726	76,983	175,283
Expenses:
Incentive Fees (rebate)		10,897		159,306
Management Fees	4,614	189,058	74,280	650,179
Risk analysis Fees	1,385	21,033	4,257	64,753
Service Fees - Class 1, 1A, 2, 2A	253,782	387,003	803,038	1,264,101
Trading Fees	562,118	733,788	1,727,327	2,366,003
Total Expenses	821,899	1,341,779	2,608,902	4,504,342
Investment income/(loss) - net	(805,822)	(1,283,053)	(2,531,919)	(4,329,059)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	(92,058)	1,175,855	(1,190,910)	1,136,964
Net unrealized gain/(loss) on private investment companies	888,297	(761,505)	5,748,034	(8,567,706)
Net realized gain/(loss) on private investment companies	(2,575)	(146,345)	(1,795,246)	277,090
Net change in open trade equity/(deficit)	(28,271)	(713,117)	477,877	(1,227,357)
Net realized gain/(loss) on swap contracts
Net unrealized gain/(loss) on swap contracts	601,127	(788,755)	496,204	799,575
Net realized gain/(loss) on U.S. Treasury securities	35,523	(98,396)	95,118	(500,063)
Net unrealized gain/(loss) on U.S. Treasury securities	(36,934)	(16)	(69,202)	21,003
Trading commissions	(9,459)	(23,962)	(29,699)	(75,709)
Net gain/(loss) on investments	1,355,649	(1,356,241)	3,732,176	(8,136,203)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	549,827	(2,639,294)	1,200,257	(12,465,262)
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	1,542	9,370	7,544	27,408
Total Income	1,542	9,370	7,544	27,408
Expenses:
Incentive Fees (rebate)		10,897		12,778
Management Fees		13,113	2,668	37,905
Service Fees - Class 1, 1A, 2, 2A	11,313	14,432	34,708	45,236
Trading Fees	126,165	145,750	382,495	454,513
Total Expenses	137,478	184,192	419,871	550,432
Investment income/(loss) - net	(135,936)	(174,822)	(412,327)	(523,024)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	165,726	(1,789,414)	1,095,404	(1,717,819)
Net realized gain/(loss) on private investment companies	(140,151)	1,572,120	(589,985)	45,769
Net unrealized gain/(loss) on swap contracts	193,070	(213,803)	154,015	299,525
Net realized gain/(loss) on U.S. Treasury securities	12,056	(11,658)	11,466	(48,013)
Net unrealized gain/(loss) on U.S. Treasury securities	(8,429)	3,255	(8,854)	(609)
Change in fair value of investments in unconsolidated trading companies	(1,298)	36,144	(86,911)	40,546
Net gain/(loss) on investments	220,974	(403,356)	575,135	(1,380,601)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	85,038	(578,178)	162,808	(1,903,625)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 85,038	$ (578,178)	$ 162,808	$ (1,903,625)
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [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	$ 0.28	$ (3.84)	$ 0.47	$ (11.95)
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [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	0.87	(3.96)	2.14	(12.28)
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [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	$ 0.88	$ (3.62)	$ 2.22	$ (11.21)
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	$ 2,215	$ 4,707	$ 4,371	$ 21,441
Total Income	2,215	4,707	4,371	21,441
Expenses:
Incentive Fees (rebate)
Management Fees		22,605	7,665	83,816
Service Fees - Class 1, 1A, 2, 2A	1,256	11,605	11,010	39,503
Trading Fees	49,626	95,225	175,662	335,271
Total Expenses	50,882	129,435	194,337	458,590
Investment income/(loss) - net	(48,667)	(124,728)	(189,966)	(437,149)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	35,290	(1,337,997)	170,629	(1,253,590)
Net realized gain/(loss) on private investment companies	(47,606)	1,306,455	(147,373)	96,298
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	5,274	(5,337)	10,671	(45,508)
Net unrealized gain/(loss) on U.S. Treasury securities	(7,593)	27,844	(4,121)	10,785
Change in fair value of investments in unconsolidated trading companies	(1,813)	(1,603)	(69,323)	(78,937)
Net gain/(loss) on investments	(16,448)	(10,638)	(39,517)	(1,270,952)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(65,115)	(135,366)	(229,483)	(1,708,101)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (65,115)	$ (135,366)	$ (229,483)	$ (1,708,101)
Frontier Masters Fund [Member] | The Series of the Frontier Funds [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	$ (2.60)	$ (2.13)	$ (6.37)	$ (17.54)
Frontier Masters Fund [Member] | The Series of the Frontier Funds [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	(2.35)	(1.99)	(5.93)	(18.88)
Frontier Masters Fund [Member] | The Series of the Frontier Funds [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	$ (2.14)	$ (1.78)	$ (5.38)	$ (17.41)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	$ 693	$ 3,176	$ 1,828	$ 10,635
Total Income	693	3,176	1,828	10,635
Expenses:
Incentive Fees (rebate)
Management Fees
Risk analysis Fees		334
Service Fees - Class 1, 1A, 2, 2A	134	334	448	1,398
Trading Fees	14,443	19,318	42,660	65,530
Total Expenses	14,577	19,652	43,108	66,928
Investment income/(loss) - net	(13,884)	(16,476)	(41,280)	(56,293)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	(196,972)	(122,307)	517,511	(274,347)
Net realized gain/(loss) on private investment companies	60,266	(22,657)	(641,976)	(186,723)
Net unrealized gain/(loss) on swap contracts	(51,763)	39,017	(94,964)	74,903
Net realized gain/(loss) on U.S. Treasury securities	2,456	(4,663)	5,161	(34,564)
Net unrealized gain/(loss) on U.S. Treasury securities	(2,391)	(2,297)	(1,996)	1,715
Change in fair value of investments in unconsolidated trading companies	(530)	1,511	(1,559)	(301)
Net gain/(loss) on investments	(188,934)	(111,396)	(217,823)	(419,317)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(202,818)	(127,872)	(259,103)	(475,610)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (202,818)	$ (127,872)	$ (259,103)	$ (475,610)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [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	$ (5.30)	$ (4.59)	$ (9.24)	$ (15.16)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [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	(9.76)	(2.98)	(10.06)	(12.27)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [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	(5.94)	(4.98)	(10.23)	(16.44)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [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	(10.18)	(3.13)	(10.5)	(12.88)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [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	$ (6.21)	$ (5.17)	$ (10.59)	$ (17.05)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	$ 11,640	$ 10,592	$ 36,502	$ 35,536
Total Income	11,640	10,592	36,502	35,536
Expenses:
Incentive Fees (rebate)				145,134
Management Fees	4,614	26,643	17,979	69,545
Risk analysis Fees	1,385	1,612	4,257	5,141
Service Fees - Class 1, 1A, 2, 2A	145,900	222,302	470,826	723,093
Trading Fees	236,156	339,537	763,616	1,068,482
Total Expenses	388,055	590,094	1,256,678	2,011,395
Investment income/(loss) - net	(376,415)	(579,502)	(1,220,176)	(1,975,859)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	(92,058)	13,124	165,840	(270,212)
Net unrealized gain/(loss) on private investment companies	236,355	(373,146)	1,703,296	(3,522,386)
Net realized gain/(loss) on private investment companies	(26,292)	8,097	(787,630)	244,703
Net change in open trade equity/(deficit)	(28,271)	(63,530)	(224,786)	(141,192)
Net unrealized gain/(loss) on swap contracts	458,043	(620,424)	354,147	509,226
Net realized gain/(loss) on U.S. Treasury securities	3,743	(18,391)	12,092	(63,298)
Net unrealized gain/(loss) on U.S. Treasury securities	(5,494)	421	(426)	(6,119)
Trading commissions	(9,459)	(12,466)	(25,691)	(41,403)
Change in fair value of investments in unconsolidated trading companies	(847)	49,118	(140,477)	105,602
Net gain/(loss) on investments	535,720	(1,017,197)	1,056,365	(3,185,079)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	159,305	(1,596,699)	(163,811)	(5,160,938)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 159,305	$ (1,596,699)	$ (163,811)	$ (5,160,938)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [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	$ 0.33	$ (5.40)	$ (0.94)	$ (16.15)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [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	1.90	(6.82)	2.62	(20)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [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	1.58	(5.85)	2.26	(17.29)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [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	1.64	(5.83)	2.29	(17.24)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member] | 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	$ 1.41	$ (5.05)	$ 1.94	$ (14.93)
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	$ (5)		$ (5)
Total Income	(5)		(5)
Expenses:
Incentive Fees (rebate)
Management Fees
Risk analysis Fees
Service Fees - Class 1, 1A, 2, 2A	27,710	32,149	79,777	105,111
Trading Fees	21,767	27,076	66,874	92,779
Total Expenses	49,477	59,225	146,651	197,890
Investment income/(loss) - net	(49,482)	(59,225)	(146,656)	(197,890)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	25,424	163,993	284,633	(797,340)
Net realized gain/(loss) on private investment companies	113,671	(61,092)	138,172	(1,526)
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	6,987	(1,918)	18,138	(14,456)
Net unrealized gain/(loss) on U.S. Treasury securities	(5,819)	13,357	(14,497)	1,522
Trading commissions
Change in fair value of investments in unconsolidated trading companies	(1,094)	(16,945)	36,616	(53,962)
Net gain/(loss) on investments	139,169	97,395	463,062	(865,762)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	89,687	38,170	316,406	(1,063,652)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 89,687	$ 38,170	$ 316,406	$ (1,063,652)
Frontier Select Fund [Member] | The Series of the Frontier Funds [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	$ 1.72	$ 0.66	$ 6.35	$ (14.86)
Frontier Select Fund [Member] | The Series of the Frontier Funds [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	3.56	1.84	12.34	(19.32)
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member] | 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	$ 1.38	$ 8.55	$ (14.57)
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	$ (2)		$ (2)
Total Income	(2)		(2)
Expenses:
Incentive Fees (rebate)
Management Fees		104,062	38,679	366,404
Risk analysis Fees		252,006		252,006
Service Fees - Class 1, 1A, 2, 2A	45,272	(175,167)	140,174
Trading Fees	82,029	73,379	207,342	236,657
Total Expenses	127,301	254,280	386,195	855,067
Investment income/(loss) - net	(127,303)	(254,280)	(386,197)	(855,067)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	409,626		1,963,540
Net realized gain/(loss) on private investment companies	86,211		(279,918)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	231	(48,714)	26,675	(253,908)
Net unrealized gain/(loss) on U.S. Treasury securities	(3,190)	(41,503)	(32,677)	11,126
Change in fair value of investments in unconsolidated trading companies	(1,261)	156,865	(353,266)	(95,896)
Net gain/(loss) on investments	491,617	66,648	1,324,354	(338,678)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	364,314	(187,632)	938,157	(1,193,745)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 364,314	$ (187,632)	$ 938,157	$ (1,193,745)
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [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	$ 8.39	$ (2.64)	$ 20.45	$ (13.06)
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [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	13.72	2.73	34.03	(10.30)
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | The Series of the Frontier Funds [Member] | 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	$ 11.03	$ (1.68)	$ 27.24	$ (10.93)
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	$ (6)		$ (6)
Total Income	(6)		(6)
Expenses:
Incentive Fees (rebate)				1,394
Management Fees		22,635	7,289	92,509
Risk analysis Fees		97,753		97,753
Service Fees - Class 1, 1A, 2, 2A	22,197	(68,410)	66,095
Trading Fees	31,932	33,624	88,678	112,771
Total Expenses	54,129	85,602	162,062	304,427
Investment income/(loss) - net	(54,135)	(85,602)	(162,068)	(304,427)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	225,227	21,582	741,499	(498,155)
Net realized gain/(loss) on private investment companies	(51,997)	(17,465)	(125,925)	(98,763)
Net unrealized gain/(loss) on swap contracts	1,777	6,454	83,006	(84,079)
Net realized gain/(loss) on U.S. Treasury securities	4,776	(7,717)	10,916	(40,316)
Net unrealized gain/(loss) on U.S. Treasury securities	(4,018)	(1,094)	(6,631)	2,583
Change in fair value of investments in unconsolidated trading companies	(1,352)	20,832	(65,270)	22,800
Net gain/(loss) on investments	174,413	22,592	637,595	(695,930)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	120,278	(63,010)	475,527	(1,000,357)
Less: Operations attributable to non-controlling interests	(861)	3,130	40,244	(40,765)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 121,139	$ (66,140)	$ 435,283	$ (959,592)
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [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	$ 3.33	$ (1.58)	$ 13.10	$ (20.10)
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [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	6.52	(1.23)	23.95	(26.39)
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member] | 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	$ 4.82	$ (0.88)	$ (19.38)	$ (19.70)

Consolidated Statements of Chan

Consolidated Statements of Changes in Owners' Capital Equity (Unaudited) - 9 months ended Sep. 30, 2019 - USD ($)	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]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]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 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]	Frontier Funds [Member]Limited Owners [Member]	Frontier Funds [Member]Managing Owner [Member]	Frontier Funds [Member]
Owners' Capital, Beginning balance at Dec. 31, 2018	$ 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	$ 3,005	$ 172,426	$ 51,365	$ 20,019	$ 5,998	$ 20,484	$ 1,253	$ 125,021	$ 251,097	$ 46,368	$ 107,598	$ 46,961							$ 511,718				$ 16,156,510				$ 5,572,133			$ 2,445,207				$ 31,820,097				$ 3,856,862				$ 8,208,291				$ 4,465,402	$ 71,161,187	$ 851,595	$ 72,012,782
Sale of Units (including transfers)
Redemption of Units (including transfers)	(267,729)	(1,985,772)	(1,736,784)	(1,450,002)	(198,224)	(967,911)	(32,586)	(153,569)	(4,858)	(62,516)	(58,503)	(6,981,365)	(1,218,395)	(45,814)	(16,646)	(24,995)	(510,200)	(34,191)		(2,901,069)	(32,395)		(897,838)	(91,031)			(39,000)	(33,000)		(500)	(4,000)		(43,500)	(69,000)	(10,000)	(52,000)	(15,000)											(4,029,284)				(2,649,137)			(316,532)				(8,399,715)				(554,391)				(2,985,464)				(1,003,869)	(19,682,390)	(256,000)	(19,938,390)
Operations attributable to non-controlling interests																																												40,244																											40,244
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	63,683	56,859	39,900	(19,478)	(65,606)	(141,044)	(5,794)	(169,764)	(2,874)	(24,218)	(52,905)	(244,159)	58,866	1,251	12,766	4,949	296,868	5,349	10,665	865,445	55,541	5,830	334,895	87,235	8,569	53	2,314	(2,287)	(1,068)	(570)	(2,788)	(190)	655	1,861	3,524	11,341	4,584											162,808				(229,483)			(259,103)				(163,811)				316,406				938,157				435,283	1,192,828	7,429	1,200,257
Owners' Capital, Ending balance at Sep. 30, 2019	$ 1,324,052	$ 5,740,836	$ 5,086,348	$ 14,998	$ 977,780	$ 1,665,706	$ 39,718	$ 1,468,084	$ 12,319	$ 79,251	$ 250,513	$ 18,453,993	$ 3,268,230	$ 43,513	$ 889,635	$ 335,066	$ 3,495,798	$ 70,625	$ 12,562	$ 5,719,820	$ 336,313	$ 37,912	$ 2,768,782	$ 570,196	$ 9,575	$ 3,058	$ 135,740	$ 16,078	$ 18,951	$ 4,928	$ 13,696	$ 1,063	$ 82,176	$ 183,958	$ 39,892	$ 66,939	$ 36,545							$ 551,963				$ 12,290,034				$ 2,693,513			$ 1,869,572				$ 23,256,571				$ 3,618,877				$ 6,160,984				$ 3,937,061	$ 52,671,625	$ 603,024	$ 53,274,649
Owners' Capital - Units, Beginning balance at Dec. 31, 2018	16,661	63,469	58,671	16,296	11,532	27,537	790	17,283	352	2,495	5,180	218,514	24,294	562	5,718	2,643	51,939	919	23	58,946	1,673	214	33,374	3,763	9	25	1,531	477	199	61	307	18	691	1,601	429	575	308								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, Sale of Units
Owners' Capital - Units, Redemption of Units (including transfers)	(3,771)	(16,789)	(14,382)	(16,119)	(1,922)	(10,075)	(343)	(1,524)	(93)	(1,086)	(951)	(60,363)	(6,532)	(288)	(107)	(185)	(6,982)	(334)	115	(21,321)	(153)		(8,856)	(532)	64		(349)	(319)		(5)	(65)		(243)	(445)	(97)	(272)	(101)
Owners' Capital - Units, Ending balance at Sep. 30, 2019	12,890	46,680	44,289	177	9,610	17,462	447	15,759	259	1,409	4,229	158,151	17,762	274	5,611	2,458	44,957	585	138	37,625	1,520	214	24,518	3,231	73	25	1,182	158	199	56	242	18	448	1,156	332	303	207								12,890	46,705	45,471		177	9,768	17,661		503	15,759		158,151	18,210	2,458		44,957	917	138		37,625	1,823	214		24,518	3,438	73
Net asset value per unit, Beginning balance at Dec. 31, 2018	$ 102.25	$ 120.84	$ 112.62	$ 91.1	$ 107.68	$ 100.77	$ 98.82	$ 103.66	$ 56.8	$ 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	0.47	2.14	2.22	(6.37)	(5.93)	(5.38)	(10.06)	(10.5)	(9.24)	(10.23)	(10.59)	(0.94)	2.62	2.26	2.29	1.94	6.35	12.34	8.55	20.45	34.03	27.24	13.1	23.95	19.38
Net asset value per unit, Ending balance at Sep. 30, 2019	$ 102.72	$ 122.98	$ 114.84	$ 84.73	$ 101.75	$ 95.39	$ 88.76	$ 93.16	$ 47.56	$ 56.3	$ 59.24	$ 116.69	$ 183.56	$ 159.07	$ 158.55	$ 136.1	$ 77.76	$ 120.52	$ 91.03	$ 152.02	$ 221.2	$ 177.16	$ 112.93	$ 176.48	$ 131.16

Statements of Cash Flows (unaud

Statements of Cash Flows (unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Frontier Funds [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	$ 1,200,257	$ (12,465,262)
Change in:
Net change in open trade equity/(deficit), at fair value	(423,373)	1,221,688
Net unrealized (gain)/loss on swap contracts	(496,204)	(799,574)
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	69,202	(21,003)
Net realized (gain) loss on U.S. Treasury securities, at fair value	(95,119)	500,063
Net unrealized (gain)/loss on private investment companies	(5,748,034)	8,567,706
Net realized (gain)/loss on private investment companies	1,795,246	(277,090)
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(12,565,977)	(16,729,100)
Sales of U.S. Treasury securities	16,354,416	17,281,128
(Purchases) of Private Investment Companies	(23,911,368)	(20,597,103)
Sale of Private Investment Companies	34,330,833	28,241,174
Reduction of collateral in Swap contracts		3,100,000
U.S. Treasury interest and premium paid/amortized	43,347	265,085
Increase and/or decrease in:
Receivable from futures commission merchants	8,394,591	9,869,661
Interest receivable	104,436	143,074
Receivable from related parties	(11,453)	58,146
Other assets	(558,247)
Incentive fees payable to Managing Owner	67,948	(42,139)
Management fees payable to Managing Owner, net of change in receivable	(69,376)	(11,371)
Interest payable to Managing Owner	(9,609)	(3,919)
Trading fees payable to Managing Owner	(34,414)	(96,412)
Service fees payable to Managing Owner	(23,343)	(40,687)
Due from Managing Owner	(93,696)	31,887
Risk analysis fees payable	(18,133)	3,034
Subscriptions in advance for service fee rebates	179,798
Other liabilities	17,010	(23,486)
Net cash provided by (used in) operating activities	18,498,739	18,175,500
Cash Flows from Financing Activities:
Payment for redemption of capital	(19,938,390)	(20,449,826)
Redemptions payable	23	244,355
Net cash provided by (used in) financing activities	(19,938,367)	(20,205,471)
Net increase (decrease) in cash and cash equivalents	(1,439,628)	(2,029,971)
Cash and cash equivalents, beginning of period	1,729,879	2,695,377
Cash and cash equivalents, end of period	290,251	665,406
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	162,808	(1,903,625)
Change in:
Net change in ownership allocation of U.S. Treasury securities	1,879,602	(69,880)
Net unrealized (gain)/loss on swap contracts	(154,015)	(299,525)
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	8,854	609
Net realized (gain) loss on U.S. Treasury securities, at fair value	(11,466)	48,013
Net unrealized (gain)/loss on private investment companies	(1,095,404)	1,717,819
Net realized (gain)/loss on private investment companies	589,985	(45,769)
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(2,046,958)	(1,841,423)
Sales of U.S. Treasury securities	1,531,470	1,665,387
(Purchases) of Private Investment Companies	(4,768,240)	(3,430,348)
Sale of Private Investment Companies	6,503,414	4,400,709
Reduction of collateral in Swap contracts	1	1,100,000
U.S. Treasury interest and premium paid/amortized	(5)	25,935
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,146,315	1,079,119
Interest receivable	30,717	6,341
Receivable from related parties	(105,149)
Other assets	(178,138)
Incentive fees payable to Managing Owner	6,380	(1,950)
Management fees payable to Managing Owner, net of change in receivable	(3,875)	4,195
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(4,813)	(13,905)
Service fees payable to Managing Owner	(2,283)	938
Subscriptions in advance for service fee rebates	97,019
Other liabilities		(21,907)
Net cash provided by (used in) operating activities	3,586,219	2,420,733
Cash Flows from Financing Activities:
Payment for redemption of units	(4,029,284)	(2,618,601)
Change in owner redemptions payable		73,079
Net cash provided by (used in) financing activities	(4,029,284)	(2,545,522)
Net increase (decrease) in cash and cash equivalents	(443,065)	(124,789)
Cash and cash equivalents, beginning of period	472,695	189,890
Cash and cash equivalents, end of period	29,630	65,101
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(229,483)	(1,708,101)
Change in:
Net change in ownership allocation of U.S. Treasury securities	667,275	1,589,162
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	4,121	(10,785)
Net realized (gain) loss on U.S. Treasury securities, at fair value	(10,671)	45,508
Net unrealized (gain)/loss on private investment companies	(170,629)	1,253,590
Net realized (gain)/loss on private investment companies	(147,373)	(96,298)
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(1,078,415)	(2,041,104)
Sales of U.S. Treasury securities	436,661	1,553,660
(Purchases) of Private Investment Companies	(1,779,115)	(2,928,656)
Sale of Private Investment Companies	4,175,445	4,712,267
Reduction of collateral in Swap contracts
U.S. Treasury interest and premium paid/amortized	4,371	14,162
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	765,267	531,197
Interest receivable	2,266	27,586
Receivable from related parties
Other assets		2,973
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner, net of change in receivable	(8,347)	(1,455)
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(11,077)	(16,958)
Service fees payable to Managing Owner	(1,633)	(945)
Subscriptions in advance for service fee rebates	3,658
Other liabilities	381	39,602
Net cash provided by (used in) operating activities	2,622,702	2,965,405
Cash Flows from Financing Activities:
Payment for redemption of units	(2,649,137)	(3,456,368)
Change in owner redemptions payable		114,815
Net cash provided by (used in) financing activities	(2,649,137)	(3,341,553)
Net increase (decrease) in cash and cash equivalents	(26,435)	(376,147)
Cash and cash equivalents, beginning of period	46,374	411,695
Cash and cash equivalents, end of period	19,939	35,548
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	(259,103)	(475,610)
Change in:
Net change in ownership allocation of U.S. Treasury securities	(369,853)	(208,272)
Net unrealized (gain)/loss on swap contracts	94,964	(74,903)
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	1,996	(1,715)
Net realized (gain) loss on U.S. Treasury securities, at fair value	(5,161)	34,564
Net unrealized (gain)/loss on private investment companies	(517,511)	274,347
Net realized (gain)/loss on private investment companies	641,976	186,723
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(535,065)	(887,337)
Sales of U.S. Treasury securities	948,424	1,189,411
(Purchases) of Private Investment Companies	(1,149,013)	(1,081,849)
Sale of Private Investment Companies	1,346,455	1,691,274
Reduction of collateral in Swap contracts
U.S. Treasury interest and premium paid/amortized	1,828	13,128
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	15,966	21,650
Interest receivable	3,086	8,761
Receivable from related parties
Other assets		(43,557)
Incentive fees payable to Managing Owner	60,871
Management fees payable to Managing Owner, net of change in receivable
Interest payable to Managing Owner	(37)	(59)
Trading fees payable to Managing Owner	(716)	(2,866)
Service fees payable to Managing Owner	(51)	(106)
Subscriptions in advance for service fee rebates
Other liabilities	637
Net cash provided by (used in) operating activities	279,693	643,584
Cash Flows from Financing Activities:
Payment for redemption of units	(316,532)	(769,015)
Change in owner redemptions payable		6,185
Net cash provided by (used in) financing activities	(316,532)	(762,830)
Net increase (decrease) in cash and cash equivalents	(36,839)	(119,246)
Cash and cash equivalents, beginning of period	61,600	152,200
Cash and cash equivalents, end of period	24,761	32,954
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(163,811)	(5,160,938)
Change in:
Net change in open trade equity/(deficit), at fair value	195,475	201,996
Net change in ownership allocation of U.S. Treasury securities	1,479,242	53,128
Net unrealized (gain)/loss on swap contracts	(354,147)	(509,226)
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	426	6,119
Net realized (gain) loss on U.S. Treasury securities, at fair value	(12,092)	63,298
Net unrealized (gain)/loss on private investment companies	(1,703,296)	3,522,386
Net realized (gain)/loss on private investment companies	787,630	(244,703)
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(2,671,069)	(3,228,823)
Sales of U.S. Treasury securities	972,761	2,213,107
(Purchases) of Private Investment Companies	(8,141,550)	(6,751,508)
Sale of Private Investment Companies	16,823,824	9,805,250
Reduction of collateral in Swap contracts		2,000,000
U.S. Treasury interest and premium paid/amortized	36,502	41,873
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,720,824	1,033,362
Receivable from futures commission merchants	(177,958)	4,727,066
Interest receivable	391	2,361
Other assets	(380,111)	(40,189)
Incentive fees payable to Managing Owner		11,554
Management fees payable to Managing Owner, net of change in receivable	(5,248)	1,063
Interest payable to Managing Owner	(1,244)	(32,716)
Trading fees payable to Managing Owner	(25,253)	(26,198)
Service fees payable to Managing Owner	(14,538)	302
Due from Managing Owner		184,106
Risk analysis fees payable	302
Subscriptions in advance for service fee rebates	50,347
Other liabilities	1,019	125,196
Net cash provided by (used in) operating activities	8,418,426	7,997,866
Cash Flows from Financing Activities:
Payment for redemption of units	(8,399,715)	(8,088,356)
Change in owner redemptions payable	(7,187)	31,266
Net cash provided by (used in) financing activities	(8,406,902)	(8,057,090)
Net increase (decrease) in cash and cash equivalents	11,524	(59,224)
Cash and cash equivalents, beginning of period	37,556	164,332
Cash and cash equivalents, end of period	49,080	105,108
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	316,406	(1,063,652)
Change in:
Net change in open trade equity/(deficit), at fair value
Net change in ownership allocation of U.S. Treasury securities	(914,443)	509,154
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	14,497	(1,522)
Net realized (gain) loss on U.S. Treasury securities, at fair value	(18,138)	14,456
Net unrealized (gain)/loss on private investment companies	(284,633)	797,340
Net realized (gain)/loss on private investment companies	(138,172)	1,526
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(1,332,376)	(899,134)
Sales of U.S. Treasury securities	1,906,054	501,919
(Purchases) of Private Investment Companies	(1,071,749)	(2,471,707)
Sale of Private Investment Companies	2,167,428	3,809,055
Reduction of collateral in Swap contracts
U.S. Treasury interest and premium paid/amortized	(5)	9,132
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	(61,265)	63,092
Receivable from futures commission merchants
Interest receivable	(1,195)	6,820
Other assets		(17,218)
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner, net of change in receivable
Interest payable to Managing Owner	282	(593)
Trading fees payable to Managing Owner	(369)	(6,368)
Service fees payable to Managing Owner	(188)	(6,993)
Due from Managing Owner
Risk analysis fees payable
Subscriptions in advance for service fee rebates	4,560
Other liabilities	8,572	(5,725)
Net cash provided by (used in) operating activities	595,266	1,239,582
Cash Flows from Financing Activities:
Payment for redemption of units	(554,391)	(1,346,141)
Change in owner redemptions payable		10,437
Net cash provided by (used in) financing activities	(554,391)	(1,335,704)
Net increase (decrease) in cash and cash equivalents	40,875	(92,050)
Cash and cash equivalents, beginning of period	25,072	114,973
Cash and cash equivalents, end of period	65,947	22,923
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	938,157	(1,193,745)
Change in:
Net change in ownership allocation of U.S. Treasury securities	(2,136,419)	(1,817,543)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	32,677	(11,126)
Net realized (gain) loss on U.S. Treasury securities, at fair value	(26,675)	253,908
Net unrealized (gain)/loss on private investment companies	(1,963,540)
Net realized (gain)/loss on private investment companies	279,918
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(3,455,520)	(6,626,880)
Sales of U.S. Treasury securities	8,578,317	8,763,300
(Purchases) of Private Investment Companies	(4,884,833)
Sale of Private Investment Companies	373,200
U.S. Treasury interest and premium paid/amortized	(2)	137,325
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	4,281,863	2,976,782
Interest receivable	63,537	76,588
Receivable from related parties		58,146
Other assets		(18,359)
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner, net of change in receivable	(42,705)	(18,565)
Interest payable to Managing Owner	(7,846)	(5,222)
Trading fees payable to Managing Owner	5,614	(19,877)
Service fees payable to Managing Owner	(4,300)	(5,901)
Subscriptions in advance for service fee rebates	14,866
Other liabilities	8,402	(82,266)
Payables to related parties		(152,219)
Net cash provided by (used in) operating activities	2,054,711	2,314,346
Cash Flows from Financing Activities:
Payment for redemption of units	(2,985,464)	(3,380,412)
Change in owner redemptions payable		7,649
Net cash provided by (used in) financing activities	(2,985,464)	(3,372,763)
Net increase (decrease) in cash and cash equivalents	(930,753)	(1,058,417)
Cash and cash equivalents, beginning of period	951,485	1,403,125
Cash and cash equivalents, end of period	20,732	344,707
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	475,527	(1,000,357)
Change in:
Net change in ownership allocation of U.S. Treasury securities	(604,742)	(54,774)
Net unrealized (gain)/loss on swap contracts	(83,006)	84,079
Net unrealized (gain) loss on U.S. Treasury securities, at fair value	6,631	(2,583)
Net realized (gain) loss on U.S. Treasury securities, at fair value	(10,916)	40,316
Net unrealized (gain)/loss on private investment companies	(741,499)	498,155
Net realized (gain)/loss on private investment companies	125,925	98,763
(Purchases) sales of:
(Purchases) of U.S. Treasury securities	(1,446,573)	(1,204,398)
Sales of U.S. Treasury securities	1,980,729	1,393,371
(Purchases) of Private Investment Companies	(750,704)	(683,033)
Sale of Private Investment Companies	1,293,592	763,850
U.S. Treasury interest and premium paid/amortized	(6)	23,530
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	687,202	636,915
Interest receivable	5,634	14,617
Receivable from related parties
Other assets		0
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner, net of change in receivable	(9,201)	(7,101)
Interest payable to Managing Owner	(764)	(690)
Trading fees payable to Managing Owner	2,200	(3,723)
Service fees payable to Managing Owner	(350)	(1,482)
Subscriptions in advance for service fee rebates	9,185
Other liabilities	2,165	(1,474)
Payables to related parties	697
Net cash provided by (used in) operating activities	941,725	593,981
Cash Flows from Financing Activities:
Payment for redemption of units	(1,003,869)	(795,000)
Change in owner redemptions payable	7,210	924
Net cash provided by (used in) financing activities	(996,659)	(794,076)
Net increase (decrease) in cash and cash equivalents	(54,934)	(200,096)
Cash and cash equivalents, beginning of period	135,096	259,161
Cash and cash equivalents, end of period	$ 80,162	$ 59,065

Organization and Purpose

Organization and Purpose	9 Months Ended
	Sep. 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 September 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 September 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	9 Months Ended
	Sep. 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 $117,449, $31,758, $163, $308,541, $15,722 and $55,344 for the Frontier Diversified, Masters, Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively, as of September 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 $677,124 as of December 31, 2018 and September 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	9 Months Ended
	Sep. 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 September 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. September 30, 2019 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 14,595 $ - $ - $ 14,595 Swap Contracts - - 6,074,428 6,074,428 U.S. Treasury Securities 191,764 - - 191,764 Frontier Masters Fund Investment in Unconsolidated Trading Companies 9,821 - - 9,821 U.S. Treasury Securities 129,040 - - 129,040 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 12,196 - - 12,196 Swap Contracts - - 384,138 384,138 U.S. Treasury Securities 160,246 - - 160,246 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 24,175 - - 24,175 Open Trade Equity (Deficit) 28,275 (3,091 ) - 25,184 Swap Contracts - - 11,149,055 11,149,055 U.S. Treasury Securities 317,639 - - 317,639 Frontier Select Fund Investment in Unconsolidated Trading Companies 32,482 - 551,963 584,445 U.S. Treasury Securities 426,797 - - 426,797 Frontier Global Fund Investment in Unconsolidated Trading Companies 10,212 - - 10,212 U.S. Treasury Securities 134,173 - - 134,173 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 39,484 - - 39,484 Swap Contracts - - 3,038,450 3,038,450 U.S. Treasury Securities 518,799 - - 518,799 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 September 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 Nine Months ending September 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 354,147 (94,964 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of September 30, 2019 $ 11,149,055 $ 384,138 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 154,014 83,006 Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of September 30, 2019 $ 6,074,428 $ For the Nine Months ending September 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 September 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 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 nine months ended September 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 September 30, 2019: Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 154,014 $ (94,964 ) $ 354,147 $ 83,006 Frontier Select Fund Investments in Unconsolidated Trading Companies $ 39,383 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 September 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. September 30, 2019 Level 1 Level 2 Level 3 Fair Open Trade Equity (Deficit) $ 86,875 $ (61,691 ) $ - $ 25,184 Swap Contracts - - 20,646,071 20,646,071 U.S. Treasury Securities 1,878,458 - - 1,878,458 December 31, 2018 Level 1 Level 2 Level 3 Fair 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 Nine Months ended September 30, 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 496,204 Proceeds from collateral reduction (1 ) Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of September 30, 2019 20,646,071 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 nine months ended September 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 September 30, 2019: Swaps $ 496,204 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	9 Months Ended
	Sep. 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 September 30, 2019, and December 31, 2018, approximately 2.2% 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 September 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 nine months ended September 30, 2019: Frontier Balanced Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Heritage 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 $ 11,063,055 $ 5,988,428 $ 354,188 $ 2,063,000 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 354,147 $ 154,014 $ (94,964 ) $ 83,006 Fair Value as of September 30, 2019 $ 11,149,055 $ 6,074,428 $ 384,138 $ 3,038,450 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 September 30, 2019 and December 31, 2018, approximately 2.21% 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 nine months ended September 30, 2019: XXXIV Balanced select swap XXXV Diversified select swap XXXVII L/S select swap 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 $ 11,063,055 $ 5,988,428 $ 354,188 $ 2,063,000 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 354,147 $ 154,014 $ (94,964 ) $ 83,006 Fair Value as of September 30, 2019 $ 11,149,055 $ 6,074,428 $ 384,138 $ 3,038,450 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	9 Months Ended
	Sep. 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 September 30, 2019 and December 31, 2018: As of September 30, 2019 As of December 31, 2018 Percentage of Percentage of Series Total Series Total Capital Invested in Capital Invested in Series Unconsolidated Trading Companies Fair Value Unconsolidated Trading Companies Fair Value Frontier Diversified Series — Frontier Trading Companies II and XXXVIII 0.12 % $ 14,595 7.19 % $ 1,160,910 Frontier Masters Fund — Frontier Trading Companies II and XXXVIII 0.36 % $ 9,821 13.91 % $ 775,088 Frontier Long/Short Commodity Fund — Frontier Trading Company XXXVIII 0.65 % $ 12,196 1.15 % $ 28,163 Frontier Balanced Fund — Frontier Trading Companies II and XXXVIII 0.10 % $ 24,175 5.48 % $ 1,744,999 Frontier Select Fund — Frontier Trading Companies XXXVIII and XXXIX 16.16 % $ 584,445 13.56 % $ 523,180 Frontier Global Fund — Frontier Trading Companies II and XXXVIII 0.16 % $ 10,212 52.30 % $ 4,292,075 Frontier Heritage Fund — Frontier Trading Companies II and XXXVIII 1.00 % $ 39,484 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 nine and three months ended September 30, 2019 and 2018. Nine Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ (138,899 ) $ (138,899 ) Frontier Trading Company XXXVIII, LLC - - 51,988 51,988 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (32,960 ) 1,276,134 (143,617 ) 1,099,557 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (21,819 ) 37,771 (28,451 ) (12,499 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (207,730 ) 1,181,067 (2,772,516 ) (1,799,179 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (36,877 ) 1,781,745 (263,870 ) 1,480,998 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 336,666 336,666 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (75,800 ) (1,019,048 ) 114,320 (980,528 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (25,311 ) 24,230 (124,478 ) (125,559 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (12,342 ) 94,895 (60,935 ) 21,618 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (62,382 ) 1,610,738 (656,986 ) 891,370 Total $ (475,221 ) $ 4,987,532 $ (3,686,778 ) $ 825,533 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ (337,431 ) $ (337,431 ) Frontier Trading Company XXXVIII, LLC - - (15,835 ) (15,835 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (275,586 ) 2,465,012 (544,481 ) 1,644,945 Total $ (275,586 ) $ 2,465,012 $ (897,747 ) $ 1,291,679 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 40,244 $ 40,244 Frontier Trading Company XXXVIII, LLC - - (3,628 ) (3,628 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (55,024 ) 494,161 (218,377 ) 220,760 Galaxy Plus Fund - TT Feeder Fund (531) LLC (59,657 ) 423,016 (153,951 ) 209,408 Total $ (114,681 ) $ 917,177 $ (335,712 ) $ 466,784 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ (59,538 ) $ (59,538 ) Frontier Trading Company XXXVIII, LLC - - (5,732 ) (5,732 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (72,845 ) 495,954 (67,669 ) 355,440 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (68,969 ) 494,538 (171,703 ) 253,866 Total $ (141,814 ) $ 990,492 $ (304,642 ) $ 544,036 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,559 ) $ (1,559 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (51,774 ) 91,669 (359,162 ) (319,267 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 102,078 102,078 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (33,999 ) 210,457 (82,652 ) 93,806 Total $ (85,773 ) $ 302,126 $ (341,295 ) $ (124,942 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ (76,616 ) $ (76,616 ) Frontier Trading Company XXXVIII, LLC - - (10,295 ) (10,295 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (31,082 ) 759,977 (110,678 ) 618,217 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (18,315 ) 22,480 (15,067 ) (10,902 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (134,743 ) 622,921 (1,655,383 ) (1,167,205 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (39,203 ) 1,170,183 (204,327 ) 926,653 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 165,797 165,797 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (53,774 ) (620,976 ) 70,231 (604,519 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (13,254 ) 10,639 (7,477 ) (10,092 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (14,152 ) 91,712 (51,421 ) 26,139 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (47,633 ) 1,000,463 (394,168 ) 558,662 Total $ (352,156 ) $ 3,057,399 $ (2,289,404 ) $ 415,839 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (65,952 ) $ (65,952 ) Frontier Trading Company XXXVIII, LLC - - (3,371 ) (3,371 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (53,384 ) 450,235 (48,097 ) 348,754 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (98,334 ) 571,048 (1,099,905 ) (627,191 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (24,523 ) 175,753 (10,967 ) 140,263 Galaxy Plus Fund - TT Feeder Fund (531) LLC (50,514 ) 368,511 (161,851 ) 156,146 Total $ (226,755 ) $ 1,565,547 $ (1,390,143 ) $ (51,351 ) Three Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - 52,720 52,720 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (10,590 ) 640,212 (345,285 ) 284,337 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (3,924 ) (8,300 ) 50,362 38,138 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (34,168 ) 2,197,458 (2,736,881 ) (573,591 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (18,141 ) 489,021 (189,474 ) 281,406 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 49,989 49,989 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (25,825 ) (82,440 ) (70,768 ) (179,033 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (3,220 ) (3,220 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (5,556 ) 49,061 (81,389 ) (37,884 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (16,734 ) 624,290 (260,857 ) 346,699 Total $ (114,938 ) $ 3,909,302 $ (3,534,803 ) $ 259,561 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,261 ) (1,261 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (121,925 ) 1,258,329 (679,244 ) 457,160 Total $ (121,925 ) $ 1,258,329 $ (680,505 ) $ 455,899 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 861 $ 861 Frontier Trading Company XXXVIII, LLC - - (1,956 ) (1,956 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (21,113 ) 271,422 (171,309 ) 79,000 Galaxy Plus Fund - TT Feeder Fund (531) LLC (15,229 ) 163,325 (80,638 ) 67,458 Total $ (36,342 ) $ 434,747 $ (253,042 ) $ 145,363 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,353 ) (1,353 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (31,111 ) 249,999 (134,889 ) 83,999 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (19,282 ) 210,449 (108,204 ) 82,963 Total $ (50,393 ) $ 460,448 $ (244,446 ) $ 165,609 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (530 ) $ (530 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (13,946 ) 470,976 (588,738 ) (131,708 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (40,791 ) (40,791 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (9,973 ) 84,971 (38,123 ) 36,875 Total $ (23,919 ) $ 555,947 $ (668,182 ) $ (136,154 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,299 ) (1,299 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (11,523 ) 380,182 (214,655 ) 154,004 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (4,242 ) (5,567 ) 33,921 24,112 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (25,787 ) 1,535,085 (1,923,484 ) (414,186 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (18,205 ) 359,073 (146,762 ) 194,106 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 21,004 21,004 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (18,552 ) (47,540 ) (43,774 ) (109,866 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - - - Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,204 ) 46,394 (71,948 ) (31,758 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (13,631 ) 396,481 (197,360 ) 185,490 Total $ (98,144 ) $ 2,664,108 $ (2,544,357 ) $ 21,607 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,813 ) (1,813 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (21,521 ) 218,469 (117,862 ) 79,086 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (16,746 ) 734,894 (911,225 ) (193,077 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (6,607 ) 98,467 (58,877 ) 32,983 Galaxy Plus Fund - TT Feeder Fund (531) LLC (11,578 ) 153,702 (78,716 ) 63,408 Total $ (56,452 ) $ 1,205,532 $ (1,168,493 ) $ (19,413 ) Nine Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company II, LLC $ - $ - $ 114,510 $ 114,510 Frontier Trading Company XXXVIII, LLC - - (8,908 ) (8,908 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (53,188 ) (277,921 ) 103,487 (227,622 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (44,264 ) (119,199 ) (22,162 ) (185,625 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LL (296,953 ) 894,510 (718,674 ) (121,117 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (47,185 ) (114,597 ) 51,845 (109,937 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (123 ) - (8,469 ) (8,592 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (111,704 ) (813,565 ) 90,256 (835,013 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (73,053 ) (34,735 ) 6,431 (101,357 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (20,503 ) (88,994 ) 9,703 (99,794 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (175,522 ) (1,567,177 ) 154,073 (1,588,626 ) Total $ (822,495 ) $ (2,121,678 ) $ (227,908 ) $ (3,172,081 ) Frontier Winton Fund Frontier Trading Company II, LLC $ - $ - $ (183,988 ) $ (183,988 ) Frontier Trading Company XXXVIII, LLC - - 88,092 88,092 Total $ - $ - $ (95,896 ) $ (95,896 ) Frontier Select Fund Frontier Trading Company XXXIX, LLC $ - $ - $ (38,351 ) $ (38,351 ) Frontier Trading Company XXXVIII, LLC - - (15,611 ) (15,611 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (83,404 ) (433,416 ) 92,847 (423,973 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (112,056 ) (80,517 ) (182,320 ) (374,893 ) Total $ (195,460 ) $ (513,933 ) $ (143,435 ) $ (852,828 ) Frontier Heritage Fund Frontier Trading Company II, LLC $ - $ - $ 26,444 $ 26,444 Frontier Trading Company XXXVIII, LLC - - (3,644 ) (3,644 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (128,567 ) (535,418 ) 67,067 (596,918 ) Total $ (128,567 ) $ (535,418 ) $ 89,867 $ (574,118 ) Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (301 ) $ (301 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (75,198 ) 191,295 (164,749 ) (48,652 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (681 ) - (145,612 ) (146,293 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (59,678 ) (230,562 ) 24,115 (266,125 ) Total $ (135,557 ) $ (39,267 ) $ (286,547 ) $ (461,371 ) Frontier Diversified Fund Frontier Trading Company II, LLC $ - $ - $ 40,239 40,239 Frontier Trading Company XXXVIII, LLC - - 307 307 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (25,766 ) (94,474 ) 36,713 (83,527 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (28,732 ) (48,799 ) (12,067 ) (89,598 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (127,929 ) 449,134 (404,314 ) (83,109 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (28,612 ) (2,139 ) 29,425 (1,326 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (62 ) 1,592 1,530 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (62,615 ) (428,811 ) 18,024 (473,402 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (45,287 ) (7,954 ) 2,742 (50,499 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (23,108 ) (89,102 ) 9,703 (102,507 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (92,781 ) (751,752 ) 54,921 (789,612 ) Total $ (434,830 ) $ (973,959 ) $ (222,715 ) $ (1,631,504 ) Frontier Masters Fund Frontier Trading Company II, LLC $ - $ - $ (99,255 ) (99,255 ) Frontier Trading Company XV, LLC - - - - Frontier Trading Company XXXVIII, LLC - - 20,318 20,318 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 (200,364 ) 498,398 (429,904 ) (131,870 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (132,925 ) (709,314 ) 39,893 (802,346 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (64,811 ) 7,178 (157,460 ) (215,093 ) Total $ (398,100 ) $ (280,134 ) $ (557,995 ) $ (1,236,229 ) Three Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company II, LLC $ - $ - $ 46,550 $ 46,550 Frontier Trading Company XXXVIII, LLC - - 2,568 2,568 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (9,291 ) (65,905 ) 96,559 21,363 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (12,879 ) 39,369 (23,273 ) 3,217 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LL (68,449 ) 525,034 (732,131 ) (275,546 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (10,825 ) 24,104 41,083 54,362 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (4,884 ) (4,884 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (38,176 ) (205,387 ) 29,398 (214,165 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (10,502 ) 37,958 (5,938 ) 21,518 Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,575 ) (46,302 ) 6,537 (46,340 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (38,085 ) 46,290 67,221 75,426 Total $ (194,782 ) $ 355,161 $ (476,310 ) $ (315,931 ) Frontier Winton Fund Frontier Trading Company II, LLC $ - $ - $ 2,568 $ 2,568 Frontier Trading Company XXXVIII, LLC - - 154,297 154,297 Total $ - $ - $ 156,865 $ 156,865 Frontier Select Fund Frontier Trading Company XXXIX, LLC $ - $ - $ 3,227 $ 3,227 Frontier Trading Company XXXVIII, LLC - - (20,172 ) (20,172 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (21,700 ) 91,839 25,085 95,224 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (31,965 ) 13,930 25,712 7,677 Total $ (53,665 ) $ 105,769 $ 33,852 $ 85,956 Frontier Heritage Fund Frontier Trading Company II, LLC $ - $ - $ 19,781 $ 19,781 Frontier Trading Company XXXVIII, LLC - - 1,051 1,051 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (33,189 ) 14,991 22,315 4,117 Total $ (33,189 ) $ 14,991 $ 43,147 $ 24,949 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 1,511 $ 1,511 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (19,658 ) 84,795 (121,669 ) (56,532 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (90,105 ) (90,105 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (15,062 ) 5,925 10,810 1,673 Total $ (34,720 ) $ 90,720 $ (199,453 ) $ (143,453 ) Frontier Diversified Fund Frontier Trading Company II, LLC $ - $ - $ 34,017 $ 34,017 Frontier Trading Company XXXVIII, LLC - - 2,127 2,127 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (4,157 ) (23,653 ) 34,404 6,594 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (9,004 ) 22,242 (13,179 ) 59 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (39,614 ) 258,878 (358,841 ) (139,577 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (9,027 ) 10,939 20,972 22,884 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (2,350 ) (2,350 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (20,929 ) (92,636 ) 16,282 (97,283 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (8,047 ) 17,990 (2,619 ) 7,324 Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,511 ) (46,302 ) 6,537 (47,276 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (20,337 ) 21,164 31,504 32,331 Total $ (118,626 ) $ 168,622 $ (231,146 ) $ (181,150 ) Frontier Masters Fund Frontier Trading Company II, LLC $ - $ - $ (4,703 ) $ (4,703 ) Frontier Trading Company XXXVIII, LLC - - 3,100 3,100 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (51,154 ) 235,343 (326,220 ) (142,031 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (32,744 ) 17,636 26,253 11,145 Galaxy Plus Fund - TT Feeder Fund (531) LLC (17,623 ) 95,172 21,795 99,344 Total $ (101,521 ) $ 348,151 $ (279,775 ) $ (33,145 ) The Series’ investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table: Redemptions Notice Redemptions Liquidity 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 - Quantmetrics Feeder Fund (527) 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 - Quantmetrics Feeder Fund (527) 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 nine months ended September 30, 2019 and 2018: Three Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (196,670 ) 2,747,191 (1,491,935 ) 1,058,586 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (8,166 ) (13,867 ) 84,283 62,250 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (90,647 ) 4,938,413 (6,160,328 ) (1,312,562 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (36,346 ) 848,094 (336,236 ) 475,512 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 30,202 30,202 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (44,377 ) (129,980 ) (114,542 ) (288,899 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (3,220 ) (3,220 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (11,760 ) 95,455 (153,337 ) (69,642 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - - - Galaxy Plus Fund - TT Feeder Fund (531) LLC (26,807 ) 317,027 (159,354 ) 130,866 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (87,340 ) 1,686,080 (834,730 ) 764,010 Total $ (502,113 ) $ 10,488,413 $ (9,139,197 ) $ 847,103 Nine Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (465,857 ) 5,447,312 (914,542 ) 4,066,913 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (40,134 ) 60,251 (43,518 ) (23,401 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (492,581 ) 2,466,705 (5,886,966 ) (3,912,842 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (76,080 ) 2,951,928 (468,197 ) 2,407,651 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 604,541 604,541 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (129,574 ) (1,640,024 ) 184,551 (1,585,047 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (38,565 ) 34,869 (131,955 ) (135,651 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (26,494 ) 186,607 (112,356 ) 47,757 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (80,033 ) (80,033 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (110,171 ) 791,527 (315,802 ) 365,554 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (292,530 ) 3,986,110 (1,534,853 ) 2,158,727 Total $ (1,671,986 ) $ 14,285,285 $ (8,699,130 ) $ 3,914,169 Three Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (13,448 ) $ (89,558 ) $ 130,963 $ 27,957 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (21,883 ) 61,611 (36,452 ) 3,276 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (178,875 ) 1,104,050 (1,538,861 ) (613,686 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (19,852 ) 35,043 62,055 77,246 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (97,339 ) (97,339 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (59,105 ) (298,023 ) 45,680 (311,448 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (18,549 ) 55,948 (8,557 ) 28,842 Galaxy Plus Fund - Quest Feeder Fund (517) LLC (14,086 ) (92,604 ) 13,074 (93,616 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (256,019 ) (256,019 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (39,323 ) 187,011 46,880 194,568 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (171,382 ) 119,936 183,815 132,369 Total $ (536,503 ) $ 1,083,414 $ (1,454,761 ) $ (907,850 ) Nine Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (81,572 ) $ (372,395 ) $ 140,200 $ (313,767 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - (76,396 ) 68,413 (7,983 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (72,912 ) (167,998 ) (34,229 ) (275,139 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (700,233 ) 2,033,337 (1,717,641 ) (384,537 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (73,829 ) (116,736 ) 81,270 (109,295 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (804 ) (62 ) (152,150 ) (153,016 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (174,274 ) (1,242,377 ) 108,280 (1,308,371 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (118,457 ) (42,689 ) 9,173 (151,973 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (43,536 ) (175,750 ) 19,406 (199,880 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (329,083 ) (329,083 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (134,728 ) 39,795 (286,272 ) (381,205 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (715,002 ) (4,340,773 ) 379,408 (4,676,367 ) Total $ (2,115,347 ) $ (4,462,044 ) $ (1,713,225 ) $ (8,290,616 ) 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 - Quantmetrics Feeder Fund (527) 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	9 Months Ended
	Sep. 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 September 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 $117,449, $31,758, $163, $308,541, $15,722 and $55,344 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 nine months ended September 30, 2019 and 2018: Three Months Ended September 30, 2019 Incentive (Rebate) Fees Management Fee Service Trading Frontier Diversified Fund $ - $ - $ 11,313 $ 126,165 Frontier Masters Fund - - 1,256 49,626 Frontier Long/Short Commodity Fund - - 134 14,443 Frontier Balanced Fund - 4,614 145,900 236,156 Frontier Select Fund - - 27,710 21,767 Frontier Global Fund - - 45,272 82,029 Frontier Heritage Fund - - 22,197 31,932 Three Months Ended September 30, 2018 Incentive Fees (rebate) Management Fees Service Trading Frontier Diversified Fund $ 10,897 $ 13,113 $ 14,432 $ 145,750 Frontier Masters Fund - 22,605 11,605 95,225 Frontier Long/Short Commodity Fund - - 334 19,318 Frontier Balanced Fund - 26,643 222,302 339,537 Frontier Select Fund - - 32,149 27,076 Frontier Winton Fund - 104,062 76,839 73,379 Frontier Heritage Fund - 22,635 29,343 33,624 Nine Months Ended September 30, 2019 Incentive (Rebate) Fees Management Fee Service Trading Frontier Diversified Fund $ - $ 2,668 $ 34,708 $ 382,495 Frontier Masters Fund - 7,665 11,010 175,662 Frontier Long/Short Commodity Fund - - 448 42,660 Frontier Balanced Fund - 17,979 470,826 763,616 Frontier Select Fund - - 79,777 66,874 Frontier Global Fund - 38,679 140,174 207,342 Frontier Heritage Fund - 7,289 66,095 88,678 Nine Months Ended September 30, 2018 Incentive Fees (rebate) Management Fees Service Trading Frontier Diversified Fund $ 12,778 $ 37,905 $ 45,236 $ 454,513 Frontier Masters Fund - 83,816 39,503 335,271 Frontier Long/Short Commodity Fund - - 1,398 65,530 Frontier Balanced Fund 145,134 69,545 723,093 1,068,482 Frontier Select Fund - - 105,111 92,779 Frontier Winton Fund - 366,404 252,006 236,657 Frontier Heritage Fund 1,394 92,509 97,753 112,771 The following table summarizes fees payable to the Managing Owner as of September 30, 2019 and December 31, 2018. As of September 30, 2019 Incentive Management Interest Service Trading Risk Analysis Frontier Diversified Fund $ - $ - $ - $ 2,215 $ 40,014 $ - Frontier Masters Fund - - - - 117 - Frontier Long/Short Commodity Fund - - - (37 ) - - Frontier Balanced Fund - 8,669 246 42,253 76,517 9,429 Frontier Select Fund - - 282 8,387 7,443 - Frontier Global Fund - - 278 13,503 29,967 - Frontier Heritage Fund - - 474 6,334 12,389 - As of December 31, 2018 Incentive Fees Management Fees 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 nine months ended September 30, 2019 and 2018: Three Months Ended September 30, September 30, September 30, September 30, Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Ratio to Average Net Assets Ratio to Average 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 5 4 0.01 % 0.00 % Frontier Long/Short Commodity Fund Class 3 129 55 0.01 % 0.00 % 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 1 877 4,688 0.00 % 0.01 % Frontier Balanced Fund Class 1AP 17 85 0.00 % 0.02 % Frontier Balanced Fund Class 2 178 848 0.00 % 0.01 % Frontier Balanced Fund Class 2a 2 12 0.00 % 0.00 % Frontier Balanced Fund Class 3a 8 31 0.00 % 0.00 % Frontier Select Fund Class 1 2,364 228 0.06 % 0.00 % Frontier Select Fund Class 1AP 8 1 0.06 % 0.01 % Frontier Select Fund Class 2 73 20 0.06 % 0.00 % Frontier Global Fund Class 1 1,236 5,024 0.02 % 0.04 % Frontier Global Fund Class 1AP 8 18 0.02 % 0.05 % Frontier Global Fund Class 2 87 310 0.02 % 0.03 % Frontier Heritage Fund Class 1 1,457 412 0.05 % 0.01 % Frontier Heritage Fund Class 1AP 5 - 0.05 % 0.00 % Frontier Heritage Fund Class 2 322 68 0.05 % 0.01 % Total $ 6,776 $ 11,804 Nine months ended September 30, 2019 September 30, September 30, September 30, September 30, Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Ratio to Average Net Assets Ratio to Average 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 14 41 0.02 % 0.02 % Frontier Long/Short Commodity Fund Class 3 337 543 0.02 % 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 3,758 19,340 0.02 % 0.06 % Frontier Balanced Fund Class 1AP 62 341 0.02 % 0.06 % Frontier Balanced Fund Class 2 733 3,504 0.02 % 0.06 % Frontier Balanced Fund Class 2a 9 51 0.00 % 0.01 % Frontier Balanced Fund Class 3a 31 139 0.00 % 0.01 % Frontier Select Fund Class 1 4,623 6,063 0.13 % 0.13 % Frontier Select Fund Class 1AP 11 26 0.16 % 0.13 % Frontier Select Fund Class 2 144 744 0.13 % 0.13 % Frontier Global Fund Class 1 23,596 67,727 0.38 % 0.60 % Frontier Global Fund Class 1AP 113 212 0.32 % 0.59 % Frontier Global Fund Class 2 1,373 7,338 0.34 % 0.65 % Frontier Heritage Fund Class 1 4,881 5,794 0.17 % 0.13 % Frontier Heritage Fund Class 1AP 8 5 0.16 % 0.14 % Frontier Heritage Fund Class 2 991 904 0.16 % 0.13 % Total $ 40,684 $ 112,772
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 September 30, 2019, the Trust had a payable to the Managing Owner in the amounts of $0, $8,669, $1,243, $72,809, $9,429 and $187,827 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 September 30, 2019 the Trust paid the Managing Owner $0, $$4,614, $1,385, $253,782 and $562,118 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. For the nine months ended September 30, 2019 the Trust paid the Managing Owner $0, $74,280, $4,257, $803,038 and $1,727,327 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. For the three months ended September 30, 2018 the Trust paid the Managing Owner $10,897, $189,058, $387,003and $733,788 for incentive fees, management fees, service fees, and trading fees, respectively. For the nine months ended September 30, 2018 the Trust paid the Managing Owner $159,306, $650,179, $1,264,101 and $2,366,003 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 September 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 September 30, 2019 and 2018, the Trust paid $6,766 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	9 Months Ended
	Sep. 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 nine months ended September 30, 2019 and 2018. Three months ending September 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, 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 Net operating results: Interest income 0.01 0.01 0.01 0.05 0.06 0.06 0.02 0.03 0.02 0.03 0.02 Expenses (1.69 ) (1.12 ) (1.05 ) (1.53 ) (1.37 ) (1.28 ) (0.76 ) (0.66 ) (0.42 ) (0.69 ) (0.45 ) Net gain/(loss) on investments, net of non-controlling interests 1.96 1.98 1.91 (1.12 ) (1.04 ) (0.91 ) (4.53 ) (9.13 ) (5.54 ) (9.52 ) (5.78 ) Net income/(loss) 0.28 0.87 0.88 (2.60 ) (2.35 ) (2.14 ) (5.30 ) (9.76 ) (5.94 ) (10.18 ) (6.21 ) Net asset value, September 30, 2019 $ 102.72 $ 122.98 $ 114.84 $ 84.73 $ 101.75 $ 95.39 $ 47.56 $ 88.76 $ 56.30 $ 93.16 $ 59.24 Ratios to average net assets Net investment income/(loss) -6.57 % -3.64 % -3.64 % -6.61 % -4.94 % -4.94 % -5.71 % -2.57 % -2.57 % -2.57 % -2.57 % Expenses before incentive fees (3)(4) 6.62 % 3.69 % 3.69 % 6.84 % 5.17 % 5.17 % 5.84 % 2.70 % 2.70 % 2.70 % 2.70 % Expenses after incentive fees (3)(4) 6.62 % 3.69 % 3.69 % 6.84 % 5.17 % 5.17 % 5.84 % 2.70 % 2.70 % 2.70 % 2.70 % Total return before incentive fees (2) 0.27 % 0.71 % 0.76 % -2.97 % -2.26 % -2.19 % -9.99 % -9.91 % -9.54 % -9.85 % -9.49 % Total return after incentive fees (2) 0.27 % 0.71 % 0.76 % -2.97 % -2.26 % -2.19 % -9.99 % -9.91 % -9.54 % -9.85 % -9.49 % 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, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Net operating results: Interest income 0.05 0.06 0.08 0.07 0.07 (0.00 ) 0.00 (0.00 ) Expenses (1.90 ) (1.24 ) (1.67 ) (1.45 ) (1.44 ) (1.01 ) (0.51 ) (0.67 ) Net gain/(loss) on investments, net of non-controlling interests 2.18 2.59 3.49 2.96 3.01 2.74 3.20 4.23 Net income/(loss) 0.33 1.41 1.90 1.58 1.64 1.73 2.69 3.56 Net asset value, September 30, 2019 $ 116.69 $ 136.10 $ 183.56 $ 159.07 $ 158.55 $ 77.76 $ 91.03 $ 120.52 Ratios to average net assets Net investment income/(loss) -6.29 % -3.48 % -3.48 % -3.48 % -3.48 % -5.45 % -2.36 % -2.36 % Expenses before incentive fees (3)(4) 6.47 % 3.66 % 3.66 % 3.66 % 3.66 % 5.45 % 2.36 % 2.36 % Expenses after incentive fees (3)(4) 6.47 % 3.66 % 3.66 % 3.66 % 3.66 % 5.45 % 2.36 % 2.36 % Total return before incentive fees (2) 0.28 % 1.05 % 1.05 % 1.00 % 1.05 % 2.28 % 3.05 % 3.04 % Total return after incentive fees (2) 0.28 % 1.05 % 1.05 % 1.00 % 1.05 % 2.28 % 3.05 % 3.04 % 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, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Net operating results: Interest income (0.00 ) (0.00 ) (0.00 ) (0.00 ) 0.00 (0.00 ) Expenses (2.98 ) (2.16 ) (2.69 ) (1.81 ) (1.16 ) (1.51 ) Net gain/(loss) on investments, net of non-controlling interests 11.36 13.19 16.41 5.14 5.98 8.03 Net income/(loss) 8.38 11.03 13.72 3.33 4.82 6.52 Net asset value, September 30, 2019 $ 152.02 $ 177.16 $ 221.20 $ 112.93 $ 131.16 $ 176.48 Ratios to average net assets Net investment income/(loss) -8.43 % -5.29 % -5.29 % -6.96 % -3.77 % -3.77 % Expenses before incentive fees (3)(4) 8.43 % 5.29 % 5.29 % 6.96 % 3.77 % 3.77 % Expenses after incentive fees (3)(4) 8.43 % 5.29 % 5.29 % 6.96 % 3.77 % 3.77 % Total return before incentive fees (2) 5.84 % 6.64 % 6.61 % 3.04 % 3.82 % 3.84 % Total return after incentive fees (2) 5.84 % 6.64 % 6.61 % 3.04 % 3.82 % 3.84 % (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. Nine months ending September 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, 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 0.06 0.07 0.06 0.09 0.11 0.10 0.04 0.08 0.05 0.09 0.05 Expenses (5.12 ) (3.35 ) (3.13 ) (5.44 ) (4.68 ) (4.38 ) (2.45 ) (1.92 ) (1.21 ) (2.02 ) (1.28 ) Net gain/(loss) on investments, net of non-controlling interests 5.54 5.42 5.29 (1.02 ) (1.36 ) (1.10 ) (6.83 ) (8.22 ) (9.06 ) (8.56 ) (9.37 ) Net income/(loss) 0.47 2.14 2.22 (6.37 ) (5.93 ) (5.38 ) (9.24 ) (10.06 ) (10.22 ) (10.50 ) (10.59 ) Net asset value, September 30, 2019 $ 102.72 $ 122.98 $ 114.84 $ 84.73 $ 101.75 $ 95.39 $ 47.56 $ 88.76 $ 56.30 $ 93.16 $ 59.24 Ratios to average net assets Net investment income/(loss) -6.65 % -3.63 % -3.63 % -8.37 % -5.87 % -5.87 % -6.35 % -2.58 % -2.58 % -2.58 % -2.58 % Expenses before incentive fees (3)(4) 6.72 % 3.70 % 3.70 % 8.51 % 6.01 % 6.01 % 6.46 % 2.70 % 2.70 % 2.70 % 2.70 % Expenses after incentive fees (3)(4) 6.72 % 3.70 % 3.70 % 8.51 % 6.01 % 6.01 % 6.46 % 2.70 % 2.70 % 2.70 % 2.70 % Total return before incentive fees (2) 0.46 % 1.77 % 1.97 % -6.99 % -5.51 % -5.34 % -16.27 % -10.18 % -15.36 % -10.13 % -15.17 % Total return after incentive fees (2) 0.46 % 1.77 % 1.97 % -6.99 % -5.51 % -5.34 % -16.27 % -10.18 % -15.36 % -10.13 % -15.17 % 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 0.16 0.18 0.25 0.21 0.21 (0.00 ) 0.00 (0.00 ) Expenses (6.03 ) (3.97 ) (5.34 ) (4.62 ) (4.62 ) (2.98 ) (1.63 ) (2.04 ) Net gain/(loss) on investments, net of non-controlling interests 4.94 5.72 7.71 6.66 6.69 9.33 10.18 14.38 Net income/(loss) (0.94 ) 1.94 2.62 2.26 2.29 6.35 8.55 12.34 Net asset value, September 30, 2019 $ 116.69 $ 136.10 $ 183.56 $ 159.07 $ 158.55 $ 77.76 $ 91.03 $ 120.52 Ratios to average net assets Net investment income/(loss) -6.77 % -3.77 % -3.77 % -3.77 % -3.77 % -5.44 % -2.43 % -2.44 % Expenses before incentive fees (3)(4) 6.96 % 3.95 % 3.95 % 3.95 % 3.95 % 5.44 % 2.43 % 2.43 % Expenses after incentive fees (3)(4) 6.96 % 3.95 % 3.95 % 3.95 % 3.95 % 5.44 % 2.43 % 2.43 % Total return before incentive fees (2) -0.80 % 1.45 % 1.45 % 1.44 % 1.47 % 8.89 % 10.37 % 11.41 % Total return after incentive fees (2) -0.80 % 1.45 % 1.45 % 1.44 % 1.47 % 8.89 % 10.37 % 11.41 % 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 (8.33 ) (6.05 ) (7.50 ) (5.13 ) (3.49 ) (4.35 ) Net gain/(loss) on investments, net of non-controlling interests 28.78 33.29 41.53 18.23 22.87 28.30 Net income/(loss) 20.45 27.24 34.03 13.10 19.38 23.95 Net asset value, September 30, 2019 $ 152.02 $ 177.16 $ 221.20 $ 112.93 $ 131.16 $ 176.48 Ratios to average net assets Net investment income/(loss) -7.93 % -4.93 % -4.93 % -6.62 % -3.61 % -3.61 % Expenses before incentive fees (3)(4) 7.93 % 4.93 % 4.93 % 6.62 % 3.61 % 3.61 % Expenses after incentive fees (3)(4) 7.93 % 4.93 % 4.93 % 6.62 % 3.61 % 3.61 % Total return before incentive fees (2) 15.54 % 18.17 % 18.18 % 13.12 % 17.34 % 15.70 % Total return after incentive fees (2) 15.54 % 18.17 % 18.18 % 13.12 % 17.34 % 15.70 % (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. Three months ending September 30, 2018 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, 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 Net operating results: Interest income 0.06 0.07 0.06 0.07 0.08 0.07 0.07 0.11 0.08 0.11 0.08 Expenses (1.83 ) (1.19 ) (1.11 ) (2.16 ) (1.91 ) (1.79 ) (1.15 ) (0.64 ) (0.48 ) (0.67 ) (0.50 ) Net gain/(loss) on investments, net of non-controlling interests (2.07 ) (2.83 ) (2.57 ) (0.03 ) (0.15 ) (0.06 ) (3.50 ) (2.44 ) (4.58 ) (2.57 ) (4.75 ) Net income/(loss) (3.84 ) (3.96 ) (3.62 ) (2.13 ) (1.99 ) (1.78 ) (4.59 ) (2.98 ) (4.98 ) (3.13 ) (5.17 ) Net asset value, September 30, 2018 $ 104.46 $ 122.91 $ 114.47 $ 97.20 $ 114.39 $ 106.99 $ 66.19 $ 103.54 $ 77.15 $ 108.62 $ 80.94 Ratios to average net assets Net investment income/(loss) -6.52 % -3.45 % -3.45 % -8.57 % -6.38 % -6.38 % -6.44 % -2.04 % -2.04 % -2.04 % -2.04 % Expenses before incentive fees (3)(4) 6.67 % 3.60 % 3.60 % 8.83 % 6.65 % 6.65 % 6.84 % 2.45 % 2.45 % 2.45 % 2.45 % Expenses after incentive fees (3)(4) 6.73 % 3.66 % 3.66 % 8.83 % 6.65 % 6.65 % 6.84 % 2.45 % 2.45 % 2.45 % 2.45 % Total return before incentive fees (2) -3.48 % -3.06 % -3.00 % -2.14 % -1.71 % -1.64 % -6.48 % -2.80 % -6.06 % -2.80 % -6.00 % Total return after incentive fees (2) -3.55 % -3.12 % -3.07 % -2.14 % -1.71 % -1.64 % -6.48 % -2.80 % -6.06 % -2.80 % -6.00 % 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, June 30, 2018 $ 125.21 $ 140.68 $ 189.72 $ 164.33 $ 163.77 $ 74.75 $ 84.07 $ 111.56 Net operating results: Interest income 0.04 0.04 0.05 0.05 0.05 0.00 0.00 0.00 Expenses (2.14 ) (1.38 ) (1.86 ) (1.61 ) (1.60 ) (1.01 ) (0.50 ) (0.67 ) Net gain/(loss) on investments, net of non-controlling interests (3.30 ) (3.71 ) (5.01 ) (4.29 ) (4.27 ) 1.67 1.88 2.51 Net income/(loss) (5.40 ) (5.05 ) (6.82 ) (5.85 ) (5.83 ) 0.66 1.38 1.84 Net asset value, September 30, 2018 $ 119.81 $ 135.63 $ 182.90 $ 158.48 $ 157.94 $ 75.41 $ 85.45 $ 113.40 Ratios to average net assets Net investment income/(loss) -6.89 % -3.89 % -3.89 % -3.89 % -3.89 % -5.36 % -2.36 % -2.36 % Expenses before incentive fees (3)(4) 7.01 % 4.01 % 4.01 % 4.01 % 4.01 % 5.36 % 2.36 % 2.36 % Expenses after incentive fees (3)(4) 7.01 % 4.01 % 4.01 % 4.01 % 4.01 % 5.36 % 2.36 % 2.36 % Total return before incentive fees (2) -4.31 % -3.59 % -3.59 % -3.56 % -3.56 % 0.88 % 1.64 % 1.65 % Total return after incentive fees (2) -4.31 % -3.59 % -3.59 % -3.56 % -3.56 % 0.88 % 1.64 % 1.65 % 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, June 30, 2018 $ 148.66 $ 167.19 $ 203.47 $ 102.68 $ 115.46 $ 154.54 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (3.55 ) (2.74 ) (3.63 ) (2.04 ) (1.43 ) (1.91 ) Net gain/(loss) on investments, net of non-controlling interests 0.91 1.06 6.36 0.46 0.55 0.68 Net income/(loss) (2.64 ) (1.68 ) 2.73 (1.58 ) (0.88 ) (1.23 ) Net asset value, September 30, 2018 $ 146.02 $ 165.51 $ 206.20 $ 101.10 $ 114.58 $ 153.31 Ratios to average net assets Net investment income/(loss) -9.49 % -6.49 % -6.49 % -7.93 % -4.93 % -4.93 % Expenses before incentive fees (3)(4) 9.49 % 6.49 % 6.49 % 7.93 % 4.93 % 4.93 % Expenses after incentive fees (3)(4) 9.49 % 6.49 % 6.49 % 7.93 % 4.93 % 4.93 % Total return before incentive fees (2) -1.78 % -1.00 % 1.34 % -1.54 % -0.76 % -0.80 % Total return after incentive fees (2) -1.78 % -1.00 % 1.34 % -1.54 % -0.76 % -0.80 % (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. Nine months ending September 30, 2018 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 0.16 0.19 0.17 0.25 0.30 0.28 0.23 0.33 0.26 0.34 0.27 Expenses (3.19 ) (3.72 ) (3.47 ) (5.44 ) (6.43 ) (5.97 ) (1.43 ) (2.06 ) (1.62 ) (2.15 ) (1.70 ) Net gain/(loss) on investments, net of non-controlling interests (8.92 ) (8.74 ) (7.92 ) (12.35 ) (12.75 ) (11.72 ) (13.96 ) (10.54 ) (15.08 ) (11.08 ) (15.62 ) Net income/(loss) (11.95 ) (12.28 ) (11.21 ) (17.54 ) (18.88 ) (17.41 ) (15.16 ) (12.27 ) (16.44 ) (12.88 ) (17.05 ) Net asset value, September 30, 2018 $ 104.46 $ 122.91 $ 114.47 $ 97.20 $ 114.39 $ 106.99 $ 66.19 $ 103.54 $ 77.15 $ 108.62 $ 80.94 Ratios to average net assets Net investment income/(loss) -3.73 % -3.73 % -3.73 % -6.92 % -6.92 % -6.92 % -2.08 % -2.08 % -2.08 % -2.08 % -2.08 % Expenses before incentive fees (3)(4) 3.86 % 3.86 % 3.86 % 7.26 % 7.26 % 7.26 % 2.47 % 2.47 % 2.47 % 2.47 % 2.47 % Expenses after incentive fees (3)(4) 3.93 % 3.93 % 3.93 % 7.26 % 7.26 % 7.26 % 2.47 % 2.47 % 2.47 % 2.47 % 2.47 % Total return before incentive fees (2) -10.20 % -9.01 % -8.85 % -15.29 % -14.17 % -14.00 % -18.64 % -10.59 % -17.57 % -10.60 % -17.40 % Total return after incentive fees (2) -10.27 % -9.08 % -8.92 % -15.29 % -14.17 % -14.00 % -18.64 % -10.59 % -17.57 % -10.60 % -17.40 % 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 0.11 0.12 0.17 0.15 0.14 0.00 0.00 0.00 Expenses (6.82 ) (4.49 ) (6.06 ) (5.26 ) (5.24 ) (3.15 ) (1.56 ) (2.10 ) Net gain/(loss) on investments, net of non-controlling interests (9.44 ) (10.57 ) (14.11 ) (12.18 ) (12.15 ) (11.71 ) (13.01 ) (17.22 ) Net income/(loss) (16.15 ) (14.93 ) (20.00 ) (17.29 ) (17.24 ) (14.86 ) (14.57 ) (19.32 ) Net asset value, September 30, 2018 $ 119.81 $ 135.63 $ 182.90 $ 158.48 $ 157.94 $ 75.41 $ 85.45 $ 113.41 Ratios to average net assets Net investment income/(loss) -7.05 % -4.05 % -4.05 % -4.05 % -4.05 % -5.37 % -2.37 % -2.37 % Expenses before incentive fees (3)(4) 6.81 % 3.81 % 3.81 % 3.81 % 3.81 % 5.37 % 2.37 % 2.37 % Expenses after incentive fees (3)(4) 7.17 % 4.17 % 4.17 % 4.17 % 4.17 % 5.37 % 2.37 % 2.37 % Total return before incentive fees (2) -11.52 % -9.55 % -9.50 % -9.48 % -9.48 % -16.46 % -14.57 % -14.56 % Total return after incentive fees (2) -11.88 % -9.92 % -9.86 % -9.84 % -9.84 % -16.46 % -14.57 % -14.56 % 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 (10.70 ) (8.20 ) (10.43 ) (6.79 ) (5.00 ) (6.56 ) Net gain/(loss) on investments, net of non-controlling interests (2.36 ) (2.73 ) 0.13 (13.31 ) (14.70 ) (19.83 ) Net income/(loss) (13.06 ) (10.93 ) (10.30 ) (20.10 ) (19.70 ) (26.39 ) Net asset value, September 30, 2018 $ 146.02 $ 165.51 $ 206.20 $ 101.09 $ 114.58 $ 153.31 Ratios to average net assets Net investment income/(loss) -9.52 % -6.52 % -6.52 % -8.46 % -5.47 % -5.47 % Expenses before incentive fees (3)(4) 9.52 % 6.52 % 6.52 % 8.44 % 5.44 % 5.44 % Expenses after incentive fees (3)(4) 9.52 % 6.52 % 6.52 % 8.46 % 5.47 % 5.47 % Total return before incentive fees (2) -8.21 % -6.19 % -4.76 % -16.56 % -14.64 % -14.66 % Total return after incentive fees (2) -8.21 % -6.19 % -4.76 % -16.59 % -14.67 % -14.69 % (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 nine months ended September 30, 2019 and 2018. This data has been derived from the information presented in the consolidated financial statements. Three months ended September 30 2019 2018 Ratios to average net assets (1) Net investment income/(loss) (1) -5.29 % -6.10 % Expenses before incentive fees (3) (4) 5.40 % 6.37 % Expenses after incentive fees (3) (4) 5.40 % 6.38 % Total return before incentive fees (2) 0.90 % -3.17 % Total return after incentive fees (2) 0.90 % -3.18 % Nine months ended September 30 2019 2018 Ratios to average net assets (1) Net investment income/(loss) (1) -5.56 % -6.07 % Expenses before incentive fees (3) (4) -5.73 % 6.15 % Expenses after incentive fees (3) (4) -5.73 % 6.32 % Total return before incentive fees (2) 1.97 % -13.04 % Total return after incentive fees (2) 1.97 % -13.20 % (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	9 Months Ended
	Sep. 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 September 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 138 246 For the Three Months Ended September 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 231 231 For the Nine months ended September 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 617 827 For the Nine months ended September 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 1,753 1,749 The following tables summarize the trading revenues for the three and nine months ended September 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2019 Type of contract Frontier Agriculturals $ (54,047 ) Currencies (161,381 ) Energies (13,734 ) Interest rates 148,301 Metals 44,521 Stock indices (55,718 ) Realized trading income/(loss) (1) $ (92,058 ) Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Frontier Agriculturals $ 9,995 Currencies (280,126 ) Energies (21,731 ) Interest rates 460,843 Metals 58,195 Stock indices (61,336 ) Realized trading income/(loss) (1) $ 165,840 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2018 Frontier Type of contract Fund Metals $ 122,534 Currencies 8,349 Energies (18,352 ) Agriculturals (26,065 ) Interest rates (64,465 ) Stock indices (8,877 ) Realized trading income/(loss) (1) $ 13,124 Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Frontier Type of contract Fund Metals $ 16,990 Currencies (190,681 ) Energies 42,905 Agriculturals 24,718 Interest rates (161,677 ) Stock indices (2,467 ) Realized trading income/(loss) (1) $ (270,212 ) (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 September 30, 2019 Type of contract Frontier Agriculturals $ 3,305 Currencies 47,292 Energies 4,480 Interest rates (81,857 ) Metals 19,396 Stock indices (20,887 ) Change in unrealized trading income/(loss) (1) $ (28,271 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Frontier Agriculturals $ 3,305 Currencies (63,185 ) Energies 20,847 Interest rates (89,117 ) Metals (80,268 ) Stock indices (16,368 ) Change in unrealized trading income/(loss) (1) $ (224,786 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2018 Frontier Type of contract Fund Metals $ (10,838 ) Currencies (83,636 ) Energies 6,294 Agriculturals 38,061 Interest rates (24,837 ) Stock indices 11,426 Change in unrealized trading income/(loss) (1) $ (63,530 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Frontier Type of contract Fund Metals $ 12,286 Currencies (185,045 ) Energies (45,174 ) Agriculturals (5,025 ) Interest rates 87,216 Stock indices (5,450 ) Change in unrealized trading income/(loss) (1) $ (141,192 ) (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 September 30, 2019 and December 31, 2018. As of September 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 74,110 $ (48,926 ) $ 25,184 Swap Contracts 11,149,055 - $ 11,149,055 Frontier Diversified Fund Swap Contracts $ 6,074,428 $ - $ 6,074,428 Frontier Long/Short Commodity Fund Swap Contracts $ 384,138 $ - $ 384,138 Frontier Heritage Fund Swap Contracts $ 3,038,450 $ - $ 3,038,450 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 September 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 the 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 September 30, 2019 and September 30, 2018, the monthly average of forwards, options and futures contracts bought was approximately 138 and 764, respectively and sold was approximately 246 and 544, respectively. The following tables summarize the trading revenues for the three and nine months ended September 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2019 Type of contract Agriculturals $ (54,047 ) Currencies (161,381 ) Energies (13,734 ) Interest rates 148,301 Metals 44,521 Stock indices (55,718 ) Realized trading income/(loss) (1) $ (92,058 ) Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2018 Type of contract Metals $ 234,519 Currencies 520,493 Energies (25,579 ) Agriculturals 198,513 Interest rates (298,384 ) Stock indices 546,293 Realized trading income/(loss) (1) $ 1,175,855 Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Agriculturals $ (49,568 ) Currencies (852,338 ) Energies (606,626 ) Interest rates 1,013,511 Metals (566,993 ) Stock indices (128,896 ) Realized trading income/(loss) (1) $ (1,190,910 ) Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Type of contract Metals $ 1,012,647 Currencies (985,268 ) Energies 1,048,526 Agriculturals 287,301 Interest rates 1,723 Stock indices (227,965 ) Realized trading income/(loss) (1) $ 1,136,964 (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 September 30, 2019 Type of contract Agriculturals $ 3,305 Currencies 47,292 Energies 4,480 Interest rates (81,857 ) Metals 19,396 Stock indices (20,887 ) Change in unrealized trading income/(loss) (1) $ (28,271 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2018 Type of contract Metals $ (235,504 ) Currencies (538,221 ) Energies 60,010 Agriculturals (160,030 ) Interest rates 84,141 Stock indices 76,487 Change in unrealized trading income/(loss) (1) $ (713,117 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Agriculturals $ (93,622 ) Currencies 217,927 Energies 226,118 Interest rates (415,874 ) Metals 508,370 Stock indices 34,958 Change in unrealized trading income/(loss) (1) $ 477,877 Unrealized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Type of contract Metals $ (474,681 ) Currencies (425,578 ) Energies (313,242 ) Agriculturals 65,596 Interest rates (30,149 ) Stock indices (49,303 ) Change in unrealized trading income/(loss) (1) $ (1,227,357 ) (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 September 30, 2019 and December 31, 2018: As of September 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented Open Trade Equity/(Deficit) $ 74,110 $ (48,926 ) $ 25,184 Swap Contracts 20,646,071 - 20,646,071 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	9 Months Ended
	Sep. 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	9 Months Ended
	Sep. 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	9 Months Ended
	Sep. 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 October 1, 2019 through November 13, 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 $293,122, $115,339, $18,068, $337,060, $37,574, $88,977 and $88,881 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 October 1, 2019 through November 13, 2019, the Trust paid $979,021 in redemptions.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 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 $117,449, $31,758, $163, $308,541, $15,722 and $55,344 for the Frontier Diversified, Masters, Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively, as of September 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 $677,124 as of December 31, 2018 and September 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)	9 Months Ended
	Sep. 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 September 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. September 30, 2019 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 14,595 $ - $ - $ 14,595 Swap Contracts - - 6,074,428 6,074,428 U.S. Treasury Securities 191,764 - - 191,764 Frontier Masters Fund Investment in Unconsolidated Trading Companies 9,821 - - 9,821 U.S. Treasury Securities 129,040 - - 129,040 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 12,196 - - 12,196 Swap Contracts - - 384,138 384,138 U.S. Treasury Securities 160,246 - - 160,246 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 24,175 - - 24,175 Open Trade Equity (Deficit) 28,275 (3,091 ) - 25,184 Swap Contracts - - 11,149,055 11,149,055 U.S. Treasury Securities 317,639 - - 317,639 Frontier Select Fund Investment in Unconsolidated Trading Companies 32,482 - 551,963 584,445 U.S. Treasury Securities 426,797 - - 426,797 Frontier Global Fund Investment in Unconsolidated Trading Companies 10,212 - - 10,212 U.S. Treasury Securities 134,173 - - 134,173 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 39,484 - - 39,484 Swap Contracts - - 3,038,450 3,038,450 U.S. Treasury Securities 518,799 - - 518,799 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 Nine Months ending September 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 354,147 (94,964 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of September 30, 2019 $ 11,149,055 $ 384,138 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 154,014 83,006 Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of September 30, 2019 $ 6,074,428 $ For the Nine Months ending September 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 September 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 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 September 30, 2019: Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 154,014 $ (94,964 ) $ 354,147 $ 83,006 Frontier Select Fund Investments in Unconsolidated Trading Companies $ 39,383 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 September 30, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. September 30, 2019 Level 1 Level 2 Level 3 Fair Open Trade Equity (Deficit) $ 86,875 $ (61,691 ) $ - $ 25,184 Swap Contracts - - 20,646,071 20,646,071 U.S. Treasury Securities 1,878,458 - - 1,878,458 December 31, 2018 Level 1 Level 2 Level 3 Fair 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 Nine Months ended September 30, 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 496,204 Proceeds from collateral reduction (1 ) Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of September 30, 2019 20,646,071 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
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 September 30, 2019: Swaps $ 496,204 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)	9 Months Ended
	Sep. 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 nine months ended September 30, 2019: Frontier Balanced Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Heritage 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 $ 11,063,055 $ 5,988,428 $ 354,188 $ 2,063,000 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 354,147 $ 154,014 $ (94,964 ) $ 83,006 Fair Value as of September 30, 2019 $ 11,149,055 $ 6,074,428 $ 384,138 $ 3,038,450 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 nine months ended September 30, 2019: XXXIV Balanced select swap XXXV Diversified select swap XXXVII L/S select swap 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 $ 11,063,055 $ 5,988,428 $ 354,188 $ 2,063,000 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 354,147 $ 154,014 $ (94,964 ) $ 83,006 Fair Value as of September 30, 2019 $ 11,149,055 $ 6,074,428 $ 384,138 $ 3,038,450 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_2

Investments in Unconsolidated Trading Companies and Private Investment Companies (Tables)	9 Months Ended
	Sep. 30, 2019
Frontier Funds [Member]
Investments in Unconsolidated Trading Companies	The following table summarizes each of the Series’ investments in unconsolidated Trading Companies as of September 30, 2019 and December 31, 2018: As of September 30, 2019 As of December 31, 2018 Percentage of Percentage of Series Total Series Total Capital Invested in Capital Invested in Series Unconsolidated Trading Companies Fair Value Unconsolidated Trading Companies Fair Value Frontier Diversified Series — Frontier Trading Companies II and XXXVIII 0.12 % $ 14,595 7.19 % $ 1,160,910 Frontier Masters Fund — Frontier Trading Companies II and XXXVIII 0.36 % $ 9,821 13.91 % $ 775,088 Frontier Long/Short Commodity Fund — Frontier Trading Company XXXVIII 0.65 % $ 12,196 1.15 % $ 28,163 Frontier Balanced Fund — Frontier Trading Companies II and XXXVIII 0.10 % $ 24,175 5.48 % $ 1,744,999 Frontier Select Fund — Frontier Trading Companies XXXVIII and XXXIX 16.16 % $ 584,445 13.56 % $ 523,180 Frontier Global Fund — Frontier Trading Companies II and XXXVIII 0.16 % $ 10,212 52.30 % $ 4,292,075 Frontier Heritage Fund — Frontier Trading Companies II and XXXVIII 1.00 % $ 39,484 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 nine and three months ended September 30, 2019 and 2018. Nine Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ (138,899 ) $ (138,899 ) Frontier Trading Company XXXVIII, LLC - - 51,988 51,988 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (32,960 ) 1,276,134 (143,617 ) 1,099,557 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (21,819 ) 37,771 (28,451 ) (12,499 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (207,730 ) 1,181,067 (2,772,516 ) (1,799,179 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (36,877 ) 1,781,745 (263,870 ) 1,480,998 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 336,666 336,666 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (75,800 ) (1,019,048 ) 114,320 (980,528 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (25,311 ) 24,230 (124,478 ) (125,559 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (12,342 ) 94,895 (60,935 ) 21,618 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (62,382 ) 1,610,738 (656,986 ) 891,370 Total $ (475,221 ) $ 4,987,532 $ (3,686,778 ) $ 825,533 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ (337,431 ) $ (337,431 ) Frontier Trading Company XXXVIII, LLC - - (15,835 ) (15,835 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (275,586 ) 2,465,012 (544,481 ) 1,644,945 Total $ (275,586 ) $ 2,465,012 $ (897,747 ) $ 1,291,679 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 40,244 $ 40,244 Frontier Trading Company XXXVIII, LLC - - (3,628 ) (3,628 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (55,024 ) 494,161 (218,377 ) 220,760 Galaxy Plus Fund - TT Feeder Fund (531) LLC (59,657 ) 423,016 (153,951 ) 209,408 Total $ (114,681 ) $ 917,177 $ (335,712 ) $ 466,784 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ (59,538 ) $ (59,538 ) Frontier Trading Company XXXVIII, LLC - - (5,732 ) (5,732 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (72,845 ) 495,954 (67,669 ) 355,440 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (68,969 ) 494,538 (171,703 ) 253,866 Total $ (141,814 ) $ 990,492 $ (304,642 ) $ 544,036 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (1,559 ) $ (1,559 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (51,774 ) 91,669 (359,162 ) (319,267 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 102,078 102,078 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (33,999 ) 210,457 (82,652 ) 93,806 Total $ (85,773 ) $ 302,126 $ (341,295 ) $ (124,942 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ (76,616 ) $ (76,616 ) Frontier Trading Company XXXVIII, LLC - - (10,295 ) (10,295 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (31,082 ) 759,977 (110,678 ) 618,217 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (18,315 ) 22,480 (15,067 ) (10,902 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (134,743 ) 622,921 (1,655,383 ) (1,167,205 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (39,203 ) 1,170,183 (204,327 ) 926,653 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 165,797 165,797 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (53,774 ) (620,976 ) 70,231 (604,519 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (13,254 ) 10,639 (7,477 ) (10,092 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (14,152 ) 91,712 (51,421 ) 26,139 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (47,633 ) 1,000,463 (394,168 ) 558,662 Total $ (352,156 ) $ 3,057,399 $ (2,289,404 ) $ 415,839 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ (65,952 ) $ (65,952 ) Frontier Trading Company XXXVIII, LLC - - (3,371 ) (3,371 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (53,384 ) 450,235 (48,097 ) 348,754 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (98,334 ) 571,048 (1,099,905 ) (627,191 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (24,523 ) 175,753 (10,967 ) 140,263 Galaxy Plus Fund - TT Feeder Fund (531) LLC (50,514 ) 368,511 (161,851 ) 156,146 Total $ (226,755 ) $ 1,565,547 $ (1,390,143 ) $ (51,351 ) Three Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - 52,720 52,720 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (10,590 ) 640,212 (345,285 ) 284,337 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (3,924 ) (8,300 ) 50,362 38,138 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (34,168 ) 2,197,458 (2,736,881 ) (573,591 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (18,141 ) 489,021 (189,474 ) 281,406 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 49,989 49,989 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (25,825 ) (82,440 ) (70,768 ) (179,033 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (3,220 ) (3,220 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (5,556 ) 49,061 (81,389 ) (37,884 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (16,734 ) 624,290 (260,857 ) 346,699 Total $ (114,938 ) $ 3,909,302 $ (3,534,803 ) $ 259,561 Frontier Global Fund — Frontier Trading Company II LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,261 ) (1,261 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (121,925 ) 1,258,329 (679,244 ) 457,160 Total $ (121,925 ) $ 1,258,329 $ (680,505 ) $ 455,899 Frontier Select Fund — Frontier Trading Company XXXIX, LLC $ - $ - $ 861 $ 861 Frontier Trading Company XXXVIII, LLC - - (1,956 ) (1,956 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (21,113 ) 271,422 (171,309 ) 79,000 Galaxy Plus Fund - TT Feeder Fund (531) LLC (15,229 ) 163,325 (80,638 ) 67,458 Total $ (36,342 ) $ 434,747 $ (253,042 ) $ 145,363 Frontier Heritage Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,353 ) (1,353 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (31,111 ) 249,999 (134,889 ) 83,999 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (19,282 ) 210,449 (108,204 ) 82,963 Total $ (50,393 ) $ 460,448 $ (244,446 ) $ 165,609 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (530 ) $ (530 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (13,946 ) 470,976 (588,738 ) (131,708 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (40,791 ) (40,791 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (9,973 ) 84,971 (38,123 ) 36,875 Total $ (23,919 ) $ 555,947 $ (668,182 ) $ (136,154 ) Frontier Diversified Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,299 ) (1,299 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (11,523 ) 380,182 (214,655 ) 154,004 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (4,242 ) (5,567 ) 33,921 24,112 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (25,787 ) 1,535,085 (1,923,484 ) (414,186 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (18,205 ) 359,073 (146,762 ) 194,106 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 21,004 21,004 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (18,552 ) (47,540 ) (43,774 ) (109,866 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - - - Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,204 ) 46,394 (71,948 ) (31,758 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (13,631 ) 396,481 (197,360 ) 185,490 Total $ (98,144 ) $ 2,664,108 $ (2,544,357 ) $ 21,607 Frontier Masters Fund — Frontier Trading Company II, LLC $ - $ - $ - $ - Frontier Trading Company XXXVIII, LLC - - (1,813 ) (1,813 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (21,521 ) 218,469 (117,862 ) 79,086 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (16,746 ) 734,894 (911,225 ) (193,077 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (6,607 ) 98,467 (58,877 ) 32,983 Galaxy Plus Fund - TT Feeder Fund (531) LLC (11,578 ) 153,702 (78,716 ) 63,408 Total $ (56,452 ) $ 1,205,532 $ (1,168,493 ) $ (19,413 ) Nine Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company II, LLC $ - $ - $ 114,510 $ 114,510 Frontier Trading Company XXXVIII, LLC - - (8,908 ) (8,908 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (53,188 ) (277,921 ) 103,487 (227,622 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (44,264 ) (119,199 ) (22,162 ) (185,625 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LL (296,953 ) 894,510 (718,674 ) (121,117 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (47,185 ) (114,597 ) 51,845 (109,937 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (123 ) - (8,469 ) (8,592 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (111,704 ) (813,565 ) 90,256 (835,013 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (73,053 ) (34,735 ) 6,431 (101,357 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (20,503 ) (88,994 ) 9,703 (99,794 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (175,522 ) (1,567,177 ) 154,073 (1,588,626 ) Total $ (822,495 ) $ (2,121,678 ) $ (227,908 ) $ (3,172,081 ) Frontier Winton Fund Frontier Trading Company II, LLC $ - $ - $ (183,988 ) $ (183,988 ) Frontier Trading Company XXXVIII, LLC - - 88,092 88,092 Total $ - $ - $ (95,896 ) $ (95,896 ) Frontier Select Fund Frontier Trading Company XXXIX, LLC $ - $ - $ (38,351 ) $ (38,351 ) Frontier Trading Company XXXVIII, LLC - - (15,611 ) (15,611 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (83,404 ) (433,416 ) 92,847 (423,973 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (112,056 ) (80,517 ) (182,320 ) (374,893 ) Total $ (195,460 ) $ (513,933 ) $ (143,435 ) $ (852,828 ) Frontier Heritage Fund Frontier Trading Company II, LLC $ - $ - $ 26,444 $ 26,444 Frontier Trading Company XXXVIII, LLC - - (3,644 ) (3,644 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (128,567 ) (535,418 ) 67,067 (596,918 ) Total $ (128,567 ) $ (535,418 ) $ 89,867 $ (574,118 ) Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (301 ) $ (301 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (75,198 ) 191,295 (164,749 ) (48,652 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (681 ) - (145,612 ) (146,293 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (59,678 ) (230,562 ) 24,115 (266,125 ) Total $ (135,557 ) $ (39,267 ) $ (286,547 ) $ (461,371 ) Frontier Diversified Fund Frontier Trading Company II, LLC $ - $ - $ 40,239 40,239 Frontier Trading Company XXXVIII, LLC - - 307 307 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (25,766 ) (94,474 ) 36,713 (83,527 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (28,732 ) (48,799 ) (12,067 ) (89,598 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (127,929 ) 449,134 (404,314 ) (83,109 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (28,612 ) (2,139 ) 29,425 (1,326 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (62 ) 1,592 1,530 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (62,615 ) (428,811 ) 18,024 (473,402 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (45,287 ) (7,954 ) 2,742 (50,499 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (23,108 ) (89,102 ) 9,703 (102,507 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (92,781 ) (751,752 ) 54,921 (789,612 ) Total $ (434,830 ) $ (973,959 ) $ (222,715 ) $ (1,631,504 ) Frontier Masters Fund Frontier Trading Company II, LLC $ - $ - $ (99,255 ) (99,255 ) Frontier Trading Company XV, LLC - - - - Frontier Trading Company XXXVIII, LLC - - 20,318 20,318 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 (200,364 ) 498,398 (429,904 ) (131,870 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (132,925 ) (709,314 ) 39,893 (802,346 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (64,811 ) 7,178 (157,460 ) (215,093 ) Total $ (398,100 ) $ (280,134 ) $ (557,995 ) $ (1,236,229 ) Three Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company II, LLC $ - $ - $ 46,550 $ 46,550 Frontier Trading Company XXXVIII, LLC - - 2,568 2,568 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (9,291 ) (65,905 ) 96,559 21,363 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (12,879 ) 39,369 (23,273 ) 3,217 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LL (68,449 ) 525,034 (732,131 ) (275,546 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (10,825 ) 24,104 41,083 54,362 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (4,884 ) (4,884 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (38,176 ) (205,387 ) 29,398 (214,165 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (10,502 ) 37,958 (5,938 ) 21,518 Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,575 ) (46,302 ) 6,537 (46,340 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (38,085 ) 46,290 67,221 75,426 Total $ (194,782 ) $ 355,161 $ (476,310 ) $ (315,931 ) Frontier Winton Fund Frontier Trading Company II, LLC $ - $ - $ 2,568 $ 2,568 Frontier Trading Company XXXVIII, LLC - - 154,297 154,297 Total $ - $ - $ 156,865 $ 156,865 Frontier Select Fund Frontier Trading Company XXXIX, LLC $ - $ - $ 3,227 $ 3,227 Frontier Trading Company XXXVIII, LLC - - (20,172 ) (20,172 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (21,700 ) 91,839 25,085 95,224 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (31,965 ) 13,930 25,712 7,677 Total $ (53,665 ) $ 105,769 $ 33,852 $ 85,956 Frontier Heritage Fund Frontier Trading Company II, LLC $ - $ - $ 19,781 $ 19,781 Frontier Trading Company XXXVIII, LLC - - 1,051 1,051 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (33,189 ) 14,991 22,315 4,117 Total $ (33,189 ) $ 14,991 $ 43,147 $ 24,949 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 1,511 $ 1,511 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (19,658 ) 84,795 (121,669 ) (56,532 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (90,105 ) (90,105 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (15,062 ) 5,925 10,810 1,673 Total $ (34,720 ) $ 90,720 $ (199,453 ) $ (143,453 ) Frontier Diversified Fund Frontier Trading Company II, LLC $ - $ - $ 34,017 $ 34,017 Frontier Trading Company XXXVIII, LLC - - 2,127 2,127 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (4,157 ) (23,653 ) 34,404 6,594 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (9,004 ) 22,242 (13,179 ) 59 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (39,614 ) 258,878 (358,841 ) (139,577 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (9,027 ) 10,939 20,972 22,884 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (2,350 ) (2,350 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (20,929 ) (92,636 ) 16,282 (97,283 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (8,047 ) 17,990 (2,619 ) 7,324 Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,511 ) (46,302 ) 6,537 (47,276 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (20,337 ) 21,164 31,504 32,331 Total $ (118,626 ) $ 168,622 $ (231,146 ) $ (181,150 ) Frontier Masters Fund Frontier Trading Company II, LLC $ - $ - $ (4,703 ) $ (4,703 ) Frontier Trading Company XXXVIII, LLC - - 3,100 3,100 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (51,154 ) 235,343 (326,220 ) (142,031 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (32,744 ) 17,636 26,253 11,145 Galaxy Plus Fund - TT Feeder Fund (531) LLC (17,623 ) 95,172 21,795 99,344 Total $ (101,521 ) $ 348,151 $ (279,775 ) $ (33,145 )
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 Notice Redemptions Liquidity 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 - Quantmetrics Feeder Fund (527) 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 - Quantmetrics Feeder Fund (527) 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
The Series of the 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 nine months ended September 30, 2019 and 2018: Three Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (196,670 ) 2,747,191 (1,491,935 ) 1,058,586 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (8,166 ) (13,867 ) 84,283 62,250 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (90,647 ) 4,938,413 (6,160,328 ) (1,312,562 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (36,346 ) 848,094 (336,236 ) 475,512 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 30,202 30,202 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (44,377 ) (129,980 ) (114,542 ) (288,899 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - (3,220 ) (3,220 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (11,760 ) 95,455 (153,337 ) (69,642 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - - - Galaxy Plus Fund - TT Feeder Fund (531) LLC (26,807 ) 317,027 (159,354 ) 130,866 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (87,340 ) 1,686,080 (834,730 ) 764,010 Total $ (502,113 ) $ 10,488,413 $ (9,139,197 ) $ 847,103 Nine Months Ended September 30, 2019 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (465,857 ) 5,447,312 (914,542 ) 4,066,913 Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (40,134 ) 60,251 (43,518 ) (23,401 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC (492,581 ) 2,466,705 (5,886,966 ) (3,912,842 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (76,080 ) 2,951,928 (468,197 ) 2,407,651 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - 604,541 604,541 Galaxy Plus Fund - QIM Feeder Fund (526) LLC (129,574 ) (1,640,024 ) 184,551 (1,585,047 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (38,565 ) 34,869 (131,955 ) (135,651 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (26,494 ) 186,607 (112,356 ) 47,757 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (80,033 ) (80,033 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (110,171 ) 791,527 (315,802 ) 365,554 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (292,530 ) 3,986,110 (1,534,853 ) 2,158,727 Total $ (1,671,986 ) $ 14,285,285 $ (8,699,130 ) $ 3,914,169 Three Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (13,448 ) $ (89,558 ) $ 130,963 $ 27,957 Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (21,883 ) 61,611 (36,452 ) 3,276 Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (178,875 ) 1,104,050 (1,538,861 ) (613,686 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (19,852 ) 35,043 62,055 77,246 Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - (97,339 ) (97,339 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (59,105 ) (298,023 ) 45,680 (311,448 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (18,549 ) 55,948 (8,557 ) 28,842 Galaxy Plus Fund - Quest Feeder Fund (517) LLC (14,086 ) (92,604 ) 13,074 (93,616 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (256,019 ) (256,019 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (39,323 ) 187,011 46,880 194,568 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (171,382 ) 119,936 183,815 132,369 Total $ (536,503 ) $ 1,083,414 $ (1,454,761 ) $ (907,850 ) Nine Months Ended September 30, 2018 Change in Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (81,572 ) $ (372,395 ) $ 140,200 $ (313,767 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - (76,396 ) 68,413 (7,983 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC (72,912 ) (167,998 ) (34,229 ) (275,139 ) Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC (700,233 ) 2,033,337 (1,717,641 ) (384,537 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (73,829 ) (116,736 ) 81,270 (109,295 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (804 ) (62 ) (152,150 ) (153,016 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (174,274 ) (1,242,377 ) 108,280 (1,308,371 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC (118,457 ) (42,689 ) 9,173 (151,973 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (43,536 ) (175,750 ) 19,406 (199,880 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (329,083 ) (329,083 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC (134,728 ) 39,795 (286,272 ) (381,205 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (715,002 ) (4,340,773 ) 379,408 (4,676,367 ) Total $ (2,115,347 ) $ (4,462,044 ) $ (1,713,225 ) $ (8,290,616 )
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 - Quantmetrics Feeder Fund (527) 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]	9 Months Ended
	Sep. 30, 2019
Schedule of fees earned by managing owner	The following table summarizes fees earned by the Managing Owner for the three and nine months ended September 30, 2019 and 2018: Three Months Ended September 30, 2019 Incentive (Rebate) Fees Management Fee Service Trading Frontier Diversified Fund $ - $ - $ 11,313 $ 126,165 Frontier Masters Fund - - 1,256 49,626 Frontier Long/Short Commodity Fund - - 134 14,443 Frontier Balanced Fund - 4,614 145,900 236,156 Frontier Select Fund - - 27,710 21,767 Frontier Global Fund - - 45,272 82,029 Frontier Heritage Fund - - 22,197 31,932 Three Months Ended September 30, 2018 Incentive Fees (rebate) Management Fees Service Trading Frontier Diversified Fund $ 10,897 $ 13,113 $ 14,432 $ 145,750 Frontier Masters Fund - 22,605 11,605 95,225 Frontier Long/Short Commodity Fund - - 334 19,318 Frontier Balanced Fund - 26,643 222,302 339,537 Frontier Select Fund - - 32,149 27,076 Frontier Winton Fund - 104,062 76,839 73,379 Frontier Heritage Fund - 22,635 29,343 33,624 Nine Months Ended September 30, 2019 Incentive (Rebate) Fees Management Fee Service Trading Frontier Diversified Fund $ - $ 2,668 $ 34,708 $ 382,495 Frontier Masters Fund - 7,665 11,010 175,662 Frontier Long/Short Commodity Fund - - 448 42,660 Frontier Balanced Fund - 17,979 470,826 763,616 Frontier Select Fund - - 79,777 66,874 Frontier Global Fund - 38,679 140,174 207,342 Frontier Heritage Fund - 7,289 66,095 88,678 Nine Months Ended September 30, 2018 Incentive Fees (rebate) Management Fees Service Trading Frontier Diversified Fund $ 12,778 $ 37,905 $ 45,236 $ 454,513 Frontier Masters Fund - 83,816 39,503 335,271 Frontier Long/Short Commodity Fund - - 1,398 65,530 Frontier Balanced Fund 145,134 69,545 723,093 1,068,482 Frontier Select Fund - - 105,111 92,779 Frontier Winton Fund - 366,404 252,006 236,657 Frontier Heritage Fund 1,394 92,509 97,753 112,771
Schedule of fees payable to managing owner	The following table summarizes fees payable to the Managing Owner as of September 30, 2019 and December 31, 2018. As of September 30, 2019 Incentive Management Interest Service Trading Risk Analysis Frontier Diversified Fund $ - $ - $ - $ 2,215 $ 40,014 $ - Frontier Masters Fund - - - - 117 - Frontier Long/Short Commodity Fund - - - (37 ) - - Frontier Balanced Fund - 8,669 246 42,253 76,517 9,429 Frontier Select Fund - - 282 8,387 7,443 - Frontier Global Fund - - 278 13,503 29,967 - Frontier Heritage Fund - - 474 6,334 12,389 - As of December 31, 2018 Incentive Fees Management Fees 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 nine months ended September 30, 2019 and 2018: Three Months Ended September 30, September 30, September 30, September 30, Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Ratio to Average Net Assets Ratio to Average 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 5 4 0.01 % 0.00 % Frontier Long/Short Commodity Fund Class 3 129 55 0.01 % 0.00 % 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 1 877 4,688 0.00 % 0.01 % Frontier Balanced Fund Class 1AP 17 85 0.00 % 0.02 % Frontier Balanced Fund Class 2 178 848 0.00 % 0.01 % Frontier Balanced Fund Class 2a 2 12 0.00 % 0.00 % Frontier Balanced Fund Class 3a 8 31 0.00 % 0.00 % Frontier Select Fund Class 1 2,364 228 0.06 % 0.00 % Frontier Select Fund Class 1AP 8 1 0.06 % 0.01 % Frontier Select Fund Class 2 73 20 0.06 % 0.00 % Frontier Global Fund Class 1 1,236 5,024 0.02 % 0.04 % Frontier Global Fund Class 1AP 8 18 0.02 % 0.05 % Frontier Global Fund Class 2 87 310 0.02 % 0.03 % Frontier Heritage Fund Class 1 1,457 412 0.05 % 0.01 % Frontier Heritage Fund Class 1AP 5 - 0.05 % 0.00 % Frontier Heritage Fund Class 2 322 68 0.05 % 0.01 % Total $ 6,776 $ 11,804 Nine months ended September 30, 2019 September 30, September 30, September 30, September 30, Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Ratio to Average Net Assets Ratio to Average 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 14 41 0.02 % 0.02 % Frontier Long/Short Commodity Fund Class 3 337 543 0.02 % 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 3,758 19,340 0.02 % 0.06 % Frontier Balanced Fund Class 1AP 62 341 0.02 % 0.06 % Frontier Balanced Fund Class 2 733 3,504 0.02 % 0.06 % Frontier Balanced Fund Class 2a 9 51 0.00 % 0.01 % Frontier Balanced Fund Class 3a 31 139 0.00 % 0.01 % Frontier Select Fund Class 1 4,623 6,063 0.13 % 0.13 % Frontier Select Fund Class 1AP 11 26 0.16 % 0.13 % Frontier Select Fund Class 2 144 744 0.13 % 0.13 % Frontier Global Fund Class 1 23,596 67,727 0.38 % 0.60 % Frontier Global Fund Class 1AP 113 212 0.32 % 0.59 % Frontier Global Fund Class 2 1,373 7,338 0.34 % 0.65 % Frontier Heritage Fund Class 1 4,881 5,794 0.17 % 0.13 % Frontier Heritage Fund Class 1AP 8 5 0.16 % 0.14 % Frontier Heritage Fund Class 2 991 904 0.16 % 0.13 % Total $ 40,684 $ 112,772

Financial Highlights (Tables)

Financial Highlights (Tables)	9 Months Ended
	Sep. 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 nine months ended September 30, 2019 and 2018. Three months ending September 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, 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 Net operating results: Interest income 0.01 0.01 0.01 0.05 0.06 0.06 0.02 0.03 0.02 0.03 0.02 Expenses (1.69 ) (1.12 ) (1.05 ) (1.53 ) (1.37 ) (1.28 ) (0.76 ) (0.66 ) (0.42 ) (0.69 ) (0.45 ) Net gain/(loss) on investments, net of non-controlling interests 1.96 1.98 1.91 (1.12 ) (1.04 ) (0.91 ) (4.53 ) (9.13 ) (5.54 ) (9.52 ) (5.78 ) Net income/(loss) 0.28 0.87 0.88 (2.60 ) (2.35 ) (2.14 ) (5.30 ) (9.76 ) (5.94 ) (10.18 ) (6.21 ) Net asset value, September 30, 2019 $ 102.72 $ 122.98 $ 114.84 $ 84.73 $ 101.75 $ 95.39 $ 47.56 $ 88.76 $ 56.30 $ 93.16 $ 59.24 Ratios to average net assets Net investment income/(loss) -6.57 % -3.64 % -3.64 % -6.61 % -4.94 % -4.94 % -5.71 % -2.57 % -2.57 % -2.57 % -2.57 % Expenses before incentive fees (3)(4) 6.62 % 3.69 % 3.69 % 6.84 % 5.17 % 5.17 % 5.84 % 2.70 % 2.70 % 2.70 % 2.70 % Expenses after incentive fees (3)(4) 6.62 % 3.69 % 3.69 % 6.84 % 5.17 % 5.17 % 5.84 % 2.70 % 2.70 % 2.70 % 2.70 % Total return before incentive fees (2) 0.27 % 0.71 % 0.76 % -2.97 % -2.26 % -2.19 % -9.99 % -9.91 % -9.54 % -9.85 % -9.49 % Total return after incentive fees (2) 0.27 % 0.71 % 0.76 % -2.97 % -2.26 % -2.19 % -9.99 % -9.91 % -9.54 % -9.85 % -9.49 % 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, June 30, 2019 $ 116.36 $ 134.69 $ 181.66 $ 157.49 $ 156.91 $ 76.03 $ 88.34 $ 116.96 Net operating results: Interest income 0.05 0.06 0.08 0.07 0.07 (0.00 ) 0.00 (0.00 ) Expenses (1.90 ) (1.24 ) (1.67 ) (1.45 ) (1.44 ) (1.01 ) (0.51 ) (0.67 ) Net gain/(loss) on investments, net of non-controlling interests 2.18 2.59 3.49 2.96 3.01 2.74 3.20 4.23 Net income/(loss) 0.33 1.41 1.90 1.58 1.64 1.73 2.69 3.56 Net asset value, September 30, 2019 $ 116.69 $ 136.10 $ 183.56 $ 159.07 $ 158.55 $ 77.76 $ 91.03 $ 120.52 Ratios to average net assets Net investment income/(loss) -6.29 % -3.48 % -3.48 % -3.48 % -3.48 % -5.45 % -2.36 % -2.36 % Expenses before incentive fees (3)(4) 6.47 % 3.66 % 3.66 % 3.66 % 3.66 % 5.45 % 2.36 % 2.36 % Expenses after incentive fees (3)(4) 6.47 % 3.66 % 3.66 % 3.66 % 3.66 % 5.45 % 2.36 % 2.36 % Total return before incentive fees (2) 0.28 % 1.05 % 1.05 % 1.00 % 1.05 % 2.28 % 3.05 % 3.04 % Total return after incentive fees (2) 0.28 % 1.05 % 1.05 % 1.00 % 1.05 % 2.28 % 3.05 % 3.04 % 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, June 30, 2019 $ 143.64 $ 166.13 $ 207.48 $ 109.60 $ 126.34 $ 169.96 Net operating results: Interest income (0.00 ) (0.00 ) (0.00 ) (0.00 ) 0.00 (0.00 ) Expenses (2.98 ) (2.16 ) (2.69 ) (1.81 ) (1.16 ) (1.51 ) Net gain/(loss) on investments, net of non-controlling interests 11.36 13.19 16.41 5.14 5.98 8.03 Net income/(loss) 8.38 11.03 13.72 3.33 4.82 6.52 Net asset value, September 30, 2019 $ 152.02 $ 177.16 $ 221.20 $ 112.93 $ 131.16 $ 176.48 Ratios to average net assets Net investment income/(loss) -8.43 % -5.29 % -5.29 % -6.96 % -3.77 % -3.77 % Expenses before incentive fees (3)(4) 8.43 % 5.29 % 5.29 % 6.96 % 3.77 % 3.77 % Expenses after incentive fees (3)(4) 8.43 % 5.29 % 5.29 % 6.96 % 3.77 % 3.77 % Total return before incentive fees (2) 5.84 % 6.64 % 6.61 % 3.04 % 3.82 % 3.84 % Total return after incentive fees (2) 5.84 % 6.64 % 6.61 % 3.04 % 3.82 % 3.84 % (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. Nine months ending September 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, 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 0.06 0.07 0.06 0.09 0.11 0.10 0.04 0.08 0.05 0.09 0.05 Expenses (5.12 ) (3.35 ) (3.13 ) (5.44 ) (4.68 ) (4.38 ) (2.45 ) (1.92 ) (1.21 ) (2.02 ) (1.28 ) Net gain/(loss) on investments, net of non-controlling interests 5.54 5.42 5.29 (1.02 ) (1.36 ) (1.10 ) (6.83 ) (8.22 ) (9.06 ) (8.56 ) (9.37 ) Net income/(loss) 0.47 2.14 2.22 (6.37 ) (5.93 ) (5.38 ) (9.24 ) (10.06 ) (10.22 ) (10.50 ) (10.59 ) Net asset value, September 30, 2019 $ 102.72 $ 122.98 $ 114.84 $ 84.73 $ 101.75 $ 95.39 $ 47.56 $ 88.76 $ 56.30 $ 93.16 $ 59.24 Ratios to average net assets Net investment income/(loss) -6.65 % -3.63 % -3.63 % -8.37 % -5.87 % -5.87 % -6.35 % -2.58 % -2.58 % -2.58 % -2.58 % Expenses before incentive fees (3)(4) 6.72 % 3.70 % 3.70 % 8.51 % 6.01 % 6.01 % 6.46 % 2.70 % 2.70 % 2.70 % 2.70 % Expenses after incentive fees (3)(4) 6.72 % 3.70 % 3.70 % 8.51 % 6.01 % 6.01 % 6.46 % 2.70 % 2.70 % 2.70 % 2.70 % Total return before incentive fees (2) 0.46 % 1.77 % 1.97 % -6.99 % -5.51 % -5.34 % -16.27 % -10.18 % -15.36 % -10.13 % -15.17 % Total return after incentive fees (2) 0.46 % 1.77 % 1.97 % -6.99 % -5.51 % -5.34 % -16.27 % -10.18 % -15.36 % -10.13 % -15.17 % 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 0.16 0.18 0.25 0.21 0.21 (0.00 ) 0.00 (0.00 ) Expenses (6.03 ) (3.97 ) (5.34 ) (4.62 ) (4.62 ) (2.98 ) (1.63 ) (2.04 ) Net gain/(loss) on investments, net of non-controlling interests 4.94 5.72 7.71 6.66 6.69 9.33 10.18 14.38 Net income/(loss) (0.94 ) 1.94 2.62 2.26 2.29 6.35 8.55 12.34 Net asset value, September 30, 2019 $ 116.69 $ 136.10 $ 183.56 $ 159.07 $ 158.55 $ 77.76 $ 91.03 $ 120.52 Ratios to average net assets Net investment income/(loss) -6.77 % -3.77 % -3.77 % -3.77 % -3.77 % -5.44 % -2.43 % -2.44 % Expenses before incentive fees (3)(4) 6.96 % 3.95 % 3.95 % 3.95 % 3.95 % 5.44 % 2.43 % 2.43 % Expenses after incentive fees (3)(4) 6.96 % 3.95 % 3.95 % 3.95 % 3.95 % 5.44 % 2.43 % 2.43 % Total return before incentive fees (2) -0.80 % 1.45 % 1.45 % 1.44 % 1.47 % 8.89 % 10.37 % 11.41 % Total return after incentive fees (2) -0.80 % 1.45 % 1.45 % 1.44 % 1.47 % 8.89 % 10.37 % 11.41 % 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 (8.33 ) (6.05 ) (7.50 ) (5.13 ) (3.49 ) (4.35 ) Net gain/(loss) on investments, net of non-controlling interests 28.78 33.29 41.53 18.23 22.87 28.30 Net income/(loss) 20.45 27.24 34.03 13.10 19.38 23.95 Net asset value, September 30, 2019 $ 152.02 $ 177.16 $ 221.20 $ 112.93 $ 131.16 $ 176.48 Ratios to average net assets Net investment income/(loss) -7.93 % -4.93 % -4.93 % -6.62 % -3.61 % -3.61 % Expenses before incentive fees (3)(4) 7.93 % 4.93 % 4.93 % 6.62 % 3.61 % 3.61 % Expenses after incentive fees (3)(4) 7.93 % 4.93 % 4.93 % 6.62 % 3.61 % 3.61 % Total return before incentive fees (2) 15.54 % 18.17 % 18.18 % 13.12 % 17.34 % 15.70 % Total return after incentive fees (2) 15.54 % 18.17 % 18.18 % 13.12 % 17.34 % 15.70 % (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. Three months ending September 30, 2018 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, 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 Net operating results: Interest income 0.06 0.07 0.06 0.07 0.08 0.07 0.07 0.11 0.08 0.11 0.08 Expenses (1.83 ) (1.19 ) (1.11 ) (2.16 ) (1.91 ) (1.79 ) (1.15 ) (0.64 ) (0.48 ) (0.67 ) (0.50 ) Net gain/(loss) on investments, net of non-controlling interests (2.07 ) (2.83 ) (2.57 ) (0.03 ) (0.15 ) (0.06 ) (3.50 ) (2.44 ) (4.58 ) (2.57 ) (4.75 ) Net income/(loss) (3.84 ) (3.96 ) (3.62 ) (2.13 ) (1.99 ) (1.78 ) (4.59 ) (2.98 ) (4.98 ) (3.13 ) (5.17 ) Net asset value, September 30, 2018 $ 104.46 $ 122.91 $ 114.47 $ 97.20 $ 114.39 $ 106.99 $ 66.19 $ 103.54 $ 77.15 $ 108.62 $ 80.94 Ratios to average net assets Net investment income/(loss) -6.52 % -3.45 % -3.45 % -8.57 % -6.38 % -6.38 % -6.44 % -2.04 % -2.04 % -2.04 % -2.04 % Expenses before incentive fees (3)(4) 6.67 % 3.60 % 3.60 % 8.83 % 6.65 % 6.65 % 6.84 % 2.45 % 2.45 % 2.45 % 2.45 % Expenses after incentive fees (3)(4) 6.73 % 3.66 % 3.66 % 8.83 % 6.65 % 6.65 % 6.84 % 2.45 % 2.45 % 2.45 % 2.45 % Total return before incentive fees (2) -3.48 % -3.06 % -3.00 % -2.14 % -1.71 % -1.64 % -6.48 % -2.80 % -6.06 % -2.80 % -6.00 % Total return after incentive fees (2) -3.55 % -3.12 % -3.07 % -2.14 % -1.71 % -1.64 % -6.48 % -2.80 % -6.06 % -2.80 % -6.00 % 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, June 30, 2018 $ 125.21 $ 140.68 $ 189.72 $ 164.33 $ 163.77 $ 74.75 $ 84.07 $ 111.56 Net operating results: Interest income 0.04 0.04 0.05 0.05 0.05 0.00 0.00 0.00 Expenses (2.14 ) (1.38 ) (1.86 ) (1.61 ) (1.60 ) (1.01 ) (0.50 ) (0.67 ) Net gain/(loss) on investments, net of non-controlling interests (3.30 ) (3.71 ) (5.01 ) (4.29 ) (4.27 ) 1.67 1.88 2.51 Net income/(loss) (5.40 ) (5.05 ) (6.82 ) (5.85 ) (5.83 ) 0.66 1.38 1.84 Net asset value, September 30, 2018 $ 119.81 $ 135.63 $ 182.90 $ 158.48 $ 157.94 $ 75.41 $ 85.45 $ 113.40 Ratios to average net assets Net investment income/(loss) -6.89 % -3.89 % -3.89 % -3.89 % -3.89 % -5.36 % -2.36 % -2.36 % Expenses before incentive fees (3)(4) 7.01 % 4.01 % 4.01 % 4.01 % 4.01 % 5.36 % 2.36 % 2.36 % Expenses after incentive fees (3)(4) 7.01 % 4.01 % 4.01 % 4.01 % 4.01 % 5.36 % 2.36 % 2.36 % Total return before incentive fees (2) -4.31 % -3.59 % -3.59 % -3.56 % -3.56 % 0.88 % 1.64 % 1.65 % Total return after incentive fees (2) -4.31 % -3.59 % -3.59 % -3.56 % -3.56 % 0.88 % 1.64 % 1.65 % 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, June 30, 2018 $ 148.66 $ 167.19 $ 203.47 $ 102.68 $ 115.46 $ 154.54 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (3.55 ) (2.74 ) (3.63 ) (2.04 ) (1.43 ) (1.91 ) Net gain/(loss) on investments, net of non-controlling interests 0.91 1.06 6.36 0.46 0.55 0.68 Net income/(loss) (2.64 ) (1.68 ) 2.73 (1.58 ) (0.88 ) (1.23 ) Net asset value, September 30, 2018 $ 146.02 $ 165.51 $ 206.20 $ 101.10 $ 114.58 $ 153.31 Ratios to average net assets Net investment income/(loss) -9.49 % -6.49 % -6.49 % -7.93 % -4.93 % -4.93 % Expenses before incentive fees (3)(4) 9.49 % 6.49 % 6.49 % 7.93 % 4.93 % 4.93 % Expenses after incentive fees (3)(4) 9.49 % 6.49 % 6.49 % 7.93 % 4.93 % 4.93 % Total return before incentive fees (2) -1.78 % -1.00 % 1.34 % -1.54 % -0.76 % -0.80 % Total return after incentive fees (2) -1.78 % -1.00 % 1.34 % -1.54 % -0.76 % -0.80 % (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. Nine months ending September 30, 2018 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 0.16 0.19 0.17 0.25 0.30 0.28 0.23 0.33 0.26 0.34 0.27 Expenses (3.19 ) (3.72 ) (3.47 ) (5.44 ) (6.43 ) (5.97 ) (1.43 ) (2.06 ) (1.62 ) (2.15 ) (1.70 ) Net gain/(loss) on investments, net of non-controlling interests (8.92 ) (8.74 ) (7.92 ) (12.35 ) (12.75 ) (11.72 ) (13.96 ) (10.54 ) (15.08 ) (11.08 ) (15.62 ) Net income/(loss) (11.95 ) (12.28 ) (11.21 ) (17.54 ) (18.88 ) (17.41 ) (15.16 ) (12.27 ) (16.44 ) (12.88 ) (17.05 ) Net asset value, September 30, 2018 $ 104.46 $ 122.91 $ 114.47 $ 97.20 $ 114.39 $ 106.99 $ 66.19 $ 103.54 $ 77.15 $ 108.62 $ 80.94 Ratios to average net assets Net investment income/(loss) -3.73 % -3.73 % -3.73 % -6.92 % -6.92 % -6.92 % -2.08 % -2.08 % -2.08 % -2.08 % -2.08 % Expenses before incentive fees (3)(4) 3.86 % 3.86 % 3.86 % 7.26 % 7.26 % 7.26 % 2.47 % 2.47 % 2.47 % 2.47 % 2.47 % Expenses after incentive fees (3)(4) 3.93 % 3.93 % 3.93 % 7.26 % 7.26 % 7.26 % 2.47 % 2.47 % 2.47 % 2.47 % 2.47 % Total return before incentive fees (2) -10.20 % -9.01 % -8.85 % -15.29 % -14.17 % -14.00 % -18.64 % -10.59 % -17.57 % -10.60 % -17.40 % Total return after incentive fees (2) -10.27 % -9.08 % -8.92 % -15.29 % -14.17 % -14.00 % -18.64 % -10.59 % -17.57 % -10.60 % -17.40 % 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 0.11 0.12 0.17 0.15 0.14 0.00 0.00 0.00 Expenses (6.82 ) (4.49 ) (6.06 ) (5.26 ) (5.24 ) (3.15 ) (1.56 ) (2.10 ) Net gain/(loss) on investments, net of non-controlling interests (9.44 ) (10.57 ) (14.11 ) (12.18 ) (12.15 ) (11.71 ) (13.01 ) (17.22 ) Net income/(loss) (16.15 ) (14.93 ) (20.00 ) (17.29 ) (17.24 ) (14.86 ) (14.57 ) (19.32 ) Net asset value, September 30, 2018 $ 119.81 $ 135.63 $ 182.90 $ 158.48 $ 157.94 $ 75.41 $ 85.45 $ 113.41 Ratios to average net assets Net investment income/(loss) -7.05 % -4.05 % -4.05 % -4.05 % -4.05 % -5.37 % -2.37 % -2.37 % Expenses before incentive fees (3)(4) 6.81 % 3.81 % 3.81 % 3.81 % 3.81 % 5.37 % 2.37 % 2.37 % Expenses after incentive fees (3)(4) 7.17 % 4.17 % 4.17 % 4.17 % 4.17 % 5.37 % 2.37 % 2.37 % Total return before incentive fees (2) -11.52 % -9.55 % -9.50 % -9.48 % -9.48 % -16.46 % -14.57 % -14.56 % Total return after incentive fees (2) -11.88 % -9.92 % -9.86 % -9.84 % -9.84 % -16.46 % -14.57 % -14.56 % 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 (10.70 ) (8.20 ) (10.43 ) (6.79 ) (5.00 ) (6.56 ) Net gain/(loss) on investments, net of non-controlling interests (2.36 ) (2.73 ) 0.13 (13.31 ) (14.70 ) (19.83 ) Net income/(loss) (13.06 ) (10.93 ) (10.30 ) (20.10 ) (19.70 ) (26.39 ) Net asset value, September 30, 2018 $ 146.02 $ 165.51 $ 206.20 $ 101.09 $ 114.58 $ 153.31 Ratios to average net assets Net investment income/(loss) -9.52 % -6.52 % -6.52 % -8.46 % -5.47 % -5.47 % Expenses before incentive fees (3)(4) 9.52 % 6.52 % 6.52 % 8.44 % 5.44 % 5.44 % Expenses after incentive fees (3)(4) 9.52 % 6.52 % 6.52 % 8.46 % 5.47 % 5.47 % Total return before incentive fees (2) -8.21 % -6.19 % -4.76 % -16.56 % -14.64 % -14.66 % Total return after incentive fees (2) -8.21 % -6.19 % -4.76 % -16.59 % -14.67 % -14.69 % (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 three and nine months ended September 30, 2019 and 2018. This data has been derived from the information presented in the consolidated financial statements. Three months ended September 30 2019 2018 Ratios to average net assets (1) Net investment income/(loss) (1) -5.29 % -6.10 % Expenses before incentive fees (3) (4) 5.40 % 6.37 % Expenses after incentive fees (3) (4) 5.40 % 6.38 % Total return before incentive fees (2) 0.90 % -3.17 % Total return after incentive fees (2) 0.90 % -3.18 % Nine months ended September 30 2019 2018 Ratios to average net assets (1) Net investment income/(loss) (1) -5.56 % -6.07 % Expenses before incentive fees (3) (4) -5.73 % 6.15 % Expenses after incentive fees (3) (4) -5.73 % 6.32 % Total return before incentive fees (2) 1.97 % -13.04 % Total return after incentive fees (2) 1.97 % -13.20 % (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)	9 Months Ended
	Sep. 30, 2019
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 September 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 138 246 For the Three Months Ended September 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 231 231 For the Nine months ended September 30, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 617 827 For the Nine months ended September 30, 2018 Monthly average contracts Bought Sold Frontier Balanced Fund 1,753 1,749
Schedule of realized trading revenue from futures, forwards and options	The following tables summarize the trading revenues for the three and nine months ended September 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2019 Type of contract Frontier Agriculturals $ (54,047 ) Currencies (161,381 ) Energies (13,734 ) Interest rates 148,301 Metals 44,521 Stock indices (55,718 ) Realized trading income/(loss) (1) $ (92,058 ) Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Frontier Agriculturals $ 9,995 Currencies (280,126 ) Energies (21,731 ) Interest rates 460,843 Metals 58,195 Stock indices (61,336 ) Realized trading income/(loss) (1) $ 165,840 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2018 Frontier Type of contract Fund Metals $ 122,534 Currencies 8,349 Energies (18,352 ) Agriculturals (26,065 ) Interest rates (64,465 ) Stock indices (8,877 ) Realized trading income/(loss) (1) $ 13,124 Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Frontier Type of contract Fund Metals $ 16,990 Currencies (190,681 ) Energies 42,905 Agriculturals 24,718 Interest rates (161,677 ) Stock indices (2,467 ) Realized trading income/(loss) (1) $ (270,212 ) (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 September 30, 2019 Type of contract Frontier Agriculturals $ 3,305 Currencies 47,292 Energies 4,480 Interest rates (81,857 ) Metals 19,396 Stock indices (20,887 ) Change in unrealized trading income/(loss) (1) $ (28,271 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Frontier Agriculturals $ 3,305 Currencies (63,185 ) Energies 20,847 Interest rates (89,117 ) Metals (80,268 ) Stock indices (16,368 ) Change in unrealized trading income/(loss) (1) $ (224,786 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2018 Frontier Type of contract Fund Metals $ (10,838 ) Currencies (83,636 ) Energies 6,294 Agriculturals 38,061 Interest rates (24,837 ) Stock indices 11,426 Change in unrealized trading income/(loss) (1) $ (63,530 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Frontier Type of contract Fund Metals $ 12,286 Currencies (185,045 ) Energies (45,174 ) Agriculturals (5,025 ) Interest rates 87,216 Stock indices (5,450 ) Change in unrealized trading income/(loss) (1) $ (141,192 ) (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 September 30, 2019 and December 31, 2018. As of September 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 74,110 $ (48,926 ) $ 25,184 Swap Contracts 11,149,055 - $ 11,149,055 Frontier Diversified Fund Swap Contracts $ 6,074,428 $ - $ 6,074,428 Frontier Long/Short Commodity Fund Swap Contracts $ 384,138 $ - $ 384,138 Frontier Heritage Fund Swap Contracts $ 3,038,450 $ - $ 3,038,450 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
The Series of the Frontier Funds [Member]
Schedule of realized trading revenue from futures, forwards and options	The following tables summarize the trading revenues for the three and nine months ended September 30, 2019 and 2018 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2019 Type of contract Agriculturals $ (54,047 ) Currencies (161,381 ) Energies (13,734 ) Interest rates 148,301 Metals 44,521 Stock indices (55,718 ) Realized trading income/(loss) (1) $ (92,058 ) Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2018 Type of contract Metals $ 234,519 Currencies 520,493 Energies (25,579 ) Agriculturals 198,513 Interest rates (298,384 ) Stock indices 546,293 Realized trading income/(loss) (1) $ 1,175,855 Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Agriculturals $ (49,568 ) Currencies (852,338 ) Energies (606,626 ) Interest rates 1,013,511 Metals (566,993 ) Stock indices (128,896 ) Realized trading income/(loss) (1) $ (1,190,910 ) Realized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Type of contract Metals $ 1,012,647 Currencies (985,268 ) Energies 1,048,526 Agriculturals 287,301 Interest rates 1,723 Stock indices (227,965 ) Realized trading income/(loss) (1) $ 1,136,964 (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 September 30, 2018 Type of contract Metals $ (235,504 ) Currencies (538,221 ) Energies 60,010 Agriculturals (160,030 ) Interest rates 84,141 Stock indices 76,487 Change in unrealized trading income/(loss) (1) $ (713,117 ) Unrealized Trading Revenue from Futures, Forwards and Options for the Nine months ended September 30, 2018 Type of contract Metals $ (474,681 ) Currencies (425,578 ) Energies (313,242 ) Agriculturals 65,596 Interest rates (30,149 ) Stock indices (49,303 ) Change in unrealized trading income/(loss) (1) $ (1,227,357 ) (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 September 30, 2019 Type of contract Agriculturals $ 3,305 Currencies 47,292 Energies 4,480 Interest rates (81,857 ) Metals 19,396 Stock indices (20,887 ) Change in unrealized trading income/(loss) (1) $ (28,271 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Nine months ended September 30, 2019 Type of contract Agriculturals $ (93,622 ) Currencies 217,927 Energies 226,118 Interest rates (415,874 ) Metals 508,370 Stock indices 34,958 Change in unrealized trading income/(loss) (1) $ 477,877
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 September 30, 2019 and December 31, 2018: As of September 30, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Net Amounts Presented Open Trade Equity/(Deficit) $ 74,110 $ (48,926 ) $ 25,184 Swap Contracts 20,646,071 - 20,646,071 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]	9 Months Ended
	Sep. 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]	9 Months Ended
	Sep. 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 ($)	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Aggregate interest income percentage	2.00%
Restricted cash	$ 2,765,900	$ 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	$ 117,449	20,430
Frontier Masters Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	31,758	28,100
Frontier Long/Short Commodity Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	163
Frontier Balanced Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	308,541	258,194
Frontier Select Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	15,722	11,162
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Significant Accounting Policies (Textual)
Advance for service fee	$ 55,344	133,281
Frontier Heritage Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee		$ 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 ($)	9 Months Ended
	Sep. 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	$ 677,124	$ 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	$ 1,588,500	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 ($)	Sep. 30, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Swap Contracts	$ 6,074,428	$ 5,920,414
U.S. Treasury Securities	191,764	1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	14,595	1,160,910
Swap Contracts	6,074,428	5,920,414
U.S. Treasury Securities	191,764	1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	14,596	1,157,971
Swap Contracts
U.S. Treasury Securities	191,765	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	6,074,428	5,920,414
U.S. Treasury Securities
Frontier Masters Fund [Member]
Swap Contracts
U.S. Treasury Securities	129,040	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	9,821	775,088
U.S. Treasury Securities	129,040	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	9,821	772,732
U.S. Treasury Securities	129,040	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	384,138	479,102
U.S. Treasury Securities	160,246	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	12,196	28,163
Swap Contracts	384,138	479,102
U.S. Treasury Securities	160,246	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	12,196	28,163
Swap Contracts
U.S. Treasury Securities	160,246	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	384,138	479,102
U.S. Treasury Securities
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	24,175	1,744,999
Open Trade Equity (Deficit)	25,184	220,659
Swap Contracts	11,149,055	10,794,908
U.S. Treasury Securities	317,639	123,409
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	24,175	1,739,609
Open Trade Equity (Deficit)	28,275	242,860
Swap Contracts
U.S. Treasury Securities	317,639	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)	(3,091)	(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	11,149,055	10,794,908
U.S. Treasury Securities
Frontier Select Fund [Member]
Swap Contracts
U.S. Treasury Securities	426,797	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	584,445	523,180
U.S. Treasury Securities	426,797	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	32,482	11,462
U.S. Treasury Securities	426,797	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	551,963	511,718
U.S. Treasury Securities
Frontier Global Fund [Member]
Swap Contracts
U.S. Treasury Securities	134,173	3,126,551
Frontier Global Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	10,212
U.S. Treasury Securities	134,173
Frontier Global Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	10,212
U.S. Treasury Securities	134,173
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	3,038,450	2,955,444
U.S. Treasury Securities	518,799	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	39,484	726,686
Swap Contracts	3,038,450	2,955,444
U.S. Treasury Securities	518,799	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	39,484	724,614
Swap Contracts
U.S. Treasury Securities	518,799	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	3,038,450	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		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 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	$ 11,340
Included in earnings-realized
Included in earnings-unrealized			354,147		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	$ 11,149,055		11,149,055		10,794,908
Frontier Long/Short Commodity Fund [Member]
Total gains or losses (realized/unrealized):	530	$ (1,511)	1,559	301
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			(94,964)		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	384,138		384,138		479,102
Frontier Diversified Fund [Member]
Total gains or losses (realized/unrealized):	1,298	(36,144)	86,911	(40,546)
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			154,014		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	6,074,428		6,074,428		5,920,414
Frontier Heritage Fund [Member]
Total gains or losses (realized/unrealized):	1,352	(20,832)	65,270	(22,800)
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			83,006		(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					2,955,444
Frontier Select Fund [Member]
Total gains or losses (realized/unrealized):	1,094	$ 16,945	(36,616)	53,962
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 ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Total change in unrealized appreciation (depreciation)	$ 154,014	$ 643
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
Total change in unrealized appreciation (depreciation)	(94,964)	82,063
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Total change in unrealized appreciation (depreciation)	354,147	1,453,948
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Total change in unrealized appreciation (depreciation)	83,006	(138,923)
Investments in Unconsolidated Trading Companies [Member] | Frontier Select Fund [Member]
Total change in unrealized appreciation (depreciation)	$ 39,383	$ (67,355)

Fair Value Measurements (Fronti

Fair Value Measurements (Frontier Funds) (Details) - Fair Value, Measurements, Recurring [Member] - Frontier Funds [Member] - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Open Trade Equity (Deficit)	$ 25,184	$ (398,189)
Swap Contracts	20,646,071	20,149,868
U.S. Treasury Securities	1,878,458	5,684,327
Level 1 Inputs [Member]
Open Trade Equity (Deficit)	86,875	(400,796)
Swap Contracts
U.S. Treasury Securities	1,878,458	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	20,646,071	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 ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Beginning, Balance of recurring Level 3 assets	$ 201,498	$ 21,208,838
Total gains or losses (realized/unrealized):
Included in earnings-realized
Included in earnings-unrealized	496,204	2,041,028
Proceeds from collateral reduction	(1)	(3,099,998)
Purchase of investments
Sale of investments
Transfers in and/or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 20,646,071	$ 201,498

Fair Value Measurements (Fron_3

Fair Value Measurements (Frontier Funds) (Details 2) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Swap [Member] | Frontier Funds [Member]
Total change in unrealized appreciation (depreciation)	$ 496,204	$ 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 ($)	9 Months Ended	12 Months Ended
	Sep. 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	$ 5,988,428	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	154,014	643,941
Fair Value	6,074,428	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	$ 354,188	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(94,964)	82,063
Fair Value	384,138	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	$ 2,063,000	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	83,006	(138,924)
Fair Value	3,038,450	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	$ 11,063,055	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	354,147	1,453,948
Fair Value	11,149,055	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 ($)	Sep. 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	2.20%	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 ($)	9 Months Ended	12 Months Ended
	Sep. 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	$ 11,063,055	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	354,147	1,453,948
Fair Value	11,149,055	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	$ 5,988,428	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	154,014	643,941
Fair Value	6,074,428	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	$ 354,188	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(94,964)	82,063
Fair Value	384,138	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	$ 2,063,000	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	83,006	(138,924)
Fair Value	3,038,450	2,955,444
Advance on swap appreciation	$ (1,900,000)	$ (1,900,000)

Swaps Contracts (Frontier Fun_2

Swaps Contracts (Frontier Funds) (Details Narrative)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Frontier Funds [Member]
Swaps Contracts (Textual)
Description of deposits assets	2.21% or $1,177,400	1.46% or $1,180,900

Investments in Unconsolidated_3

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Fair Value	$ 14,595	$ 1,160,910
Frontier Diversified Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.12%	7.19%
Fair Value	$ 14,595	$ 1,160,910
Frontier Masters Fund [Member]
Fair Value	$ 9,821	$ 775,088
Frontier Masters Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.36%	13.91%
Fair Value	$ 9,821	$ 775,088
Frontier Long/Short Commodity Fund [Member]
Fair Value	$ 12,196	$ 28,163
Frontier Long/Short Commodity Fund [Member] | Frontier Trading Company XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.65%	1.15%
Fair Value	$ 12,196	$ 28,163
Frontier Balanced Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.10%	5.48%
Fair Value	$ 24,175	$ 1,744,999
Frontier Select Fund [Member]
Fair Value	$ 584,445	$ 523,180
Frontier Select Fund [Member] | Frontier Trading Companies XXXVIII and XXXIX [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	16.16%	13.56%
Fair Value	$ 584,445	$ 523,180
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Fair Value	$ 10,212	$ 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	0.16%	52.30%
Fair Value	$ 10,212	$ 4,292,075
Frontier Heritage Fund [Member]
Fair Value	$ 39,484	$ 726,686
Frontier Heritage Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	1.00%	16.27%
Fair Value	$ 39,484	$ 726,686

Investments in Unconsolidated_4

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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Frontier Balanced Fund [Member]
Trading Commissions	$ (114,938)	$ (194,782)	$ (475,221)	$ (822,495)
Realized Gain/(Loss)	3,909,302	355,161	4,987,532	(2,121,678)
Change in Unrealized Gain/(Loss)	(3,534,803)	(476,310)	(3,686,778)	(227,908)
Net Income (Loss)	259,561	(315,931)	825,533	(3,172,081)
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions	(121,925)		(275,586)
Realized Gain/(Loss)	1,258,329		2,465,012
Change in Unrealized Gain/(Loss)	(680,505)		(897,747)
Net Income (Loss)	455,899		1,291,679
Frontier Select Fund [Member]
Trading Commissions	(36,342)	(53,665)	(114,681)	(195,460)
Realized Gain/(Loss)	434,747	105,769	917,177	(513,933)
Change in Unrealized Gain/(Loss)	(253,042)	33,852	(335,712)	(143,435)
Net Income (Loss)	145,363	85,956	466,784	(852,828)
Frontier Heritage Fund [Member]
Trading Commissions	(50,393)	(33,189)	(141,814)	(128,567)
Realized Gain/(Loss)	460,448	14,991	990,492	(535,418)
Change in Unrealized Gain/(Loss)	(244,446)	43,147	(304,642)	89,867
Net Income (Loss)	165,609	24,949	544,036	(574,118)
Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(23,919)	(34,720)	(85,773)	(135,557)
Realized Gain/(Loss)	555,947	90,720	302,126	(39,267)
Change in Unrealized Gain/(Loss)	(668,182)	(199,453)	(341,295)	(286,547)
Net Income (Loss)	(136,154)	(143,453)	(124,942)	(461,371)
Frontier Diversified Fund [Member]
Trading Commissions	(98,144)	(118,626)	(352,156)	(434,830)
Realized Gain/(Loss)	2,664,108	168,622	3,057,399	(973,959)
Change in Unrealized Gain/(Loss)	(2,544,357)	(231,146)	(2,289,404)	(222,715)
Net Income (Loss)	21,607	(181,150)	415,839	(1,631,504)
Frontier Masters Fund [Member]
Trading Commissions	(56,452)	(101,521)	(226,755)	(398,100)
Realized Gain/(Loss)	1,205,532	348,151	1,565,547	(280,134)
Change in Unrealized Gain/(Loss)	(1,168,493)	(279,775)	(1,390,143)	(557,995)
Net Income (Loss)	(19,413)	(33,145)	(51,351)	(1,236,229)
Frontier Winton Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		156,865		(95,896)
Net Income (Loss)		156,865		(95,896)
Frontier Trading Company II LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		46,550	(138,899)	114,510
Net Income (Loss)		46,550	(138,899)	114,510
Frontier Trading Company II LLC [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)			(337,431)
Net Income (Loss)			(337,431)
Frontier Trading Company II LLC [Member] | Frontier Heritage Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		19,781	(59,538)	26,444
Net Income (Loss)		19,781	(59,538)	26,444
Frontier Trading Company II LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		34,017	(76,616)	40,239
Net Income (Loss)		34,017	(76,616)	40,239
Frontier Trading Company II LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		(4,703)	(65,952)	(99,255)
Net Income (Loss)		(4,703)	(65,952)	(99,255)
Frontier Trading Company XXXVIII [Member] | Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		2,568	51,988	(8,908)
Net Income (Loss)		2,568	51,988	(8,908)
Frontier Trading Company XXXVIII [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)			(15,835)
Net Income (Loss)			(15,835)
Frontier Trading Company XXXVIII [Member] | Frontier Select Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		(20,172)	(3,628)	(15,611)
Net Income (Loss)		(20,172)	(3,628)	(15,611)
Frontier Trading Company XXXVIII [Member] | Frontier Heritage Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		1,051	(5,732)	(3,644)
Net Income (Loss)		1,051	(5,732)	(3,644)
Frontier Trading Company XXXVIII [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(530)	1,511	(1,559)	(301)
Net Income (Loss)	(530)	1,511	(1,559)	(301)
Frontier Trading Company XXXVIII [Member] | Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,813)	3,100	(3,371)	20,318
Net Income (Loss)	(1,813)	3,100	(3,371)	20,318
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(10,590)	(9,291)	(32,960)	(53,188)
Realized Gain/(Loss)	640,212	(65,905)	1,276,134	(277,921)
Change in Unrealized Gain/(Loss)	(345,285)	96,559	(143,617)	103,487
Net Income (Loss)	284,337	21,363	1,099,557	(227,622)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions	(121,925)		(275,586)
Realized Gain/(Loss)	1,258,329		2,465,012
Change in Unrealized Gain/(Loss)	(679,244)		(544,481)
Net Income (Loss)	457,160		1,644,945
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Heritage Fund [Member]
Trading Commissions	(31,111)		(72,845)
Realized Gain/(Loss)	249,999		495,954
Change in Unrealized Gain/(Loss)	(134,889)		(67,669)
Net Income (Loss)	83,999		355,440
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(11,523)	(4,157)	(31,082)	(25,766)
Realized Gain/(Loss)	380,182	(23,653)	759,977	(94,474)
Change in Unrealized Gain/(Loss)	(214,655)	34,404	(110,678)	36,713
Net Income (Loss)	154,004	6,594	618,217	(83,527)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(21,521)		(53,384)
Realized Gain/(Loss)	218,469		450,235
Change in Unrealized Gain/(Loss)	(117,862)		(48,097)
Net Income (Loss)	79,086		348,754
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(3,924)	(12,879)	(21,819)	(44,264)
Realized Gain/(Loss)	(8,300)	39,369	37,771	(119,199)
Change in Unrealized Gain/(Loss)	50,362	(23,273)	(28,451)	(22,162)
Net Income (Loss)	38,138	3,217	(12,499)	(185,625)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(4,242)	(9,004)	(18,315)	(28,732)
Realized Gain/(Loss)	(5,567)	22,242	22,480	(48,799)
Change in Unrealized Gain/(Loss)	33,921	(13,179)	(15,067)	(12,067)
Net Income (Loss)	24,112	59	(10,902)	(89,598)
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(34,168)	(68,449)	(207,730)	(296,953)
Realized Gain/(Loss)	2,197,458	525,034	1,181,067	894,510
Change in Unrealized Gain/(Loss)	(2,736,881)	(732,131)	(2,772,516)	(718,674)
Net Income (Loss)	(573,591)	(275,546)	(1,799,179)	(121,117)
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(13,946)	(19,658)	(51,774)	(75,198)
Realized Gain/(Loss)	470,976	84,795	91,669	191,295
Change in Unrealized Gain/(Loss)	(588,738)	(121,669)	(359,162)	(164,749)
Net Income (Loss)	(131,708)	(56,532)	(319,267)	(48,652)
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(25,787)	(39,614)	(134,743)	(127,929)
Realized Gain/(Loss)	1,535,085	258,878	622,921	449,134
Change in Unrealized Gain/(Loss)	(1,923,484)	(358,841)	(1,655,383)	(404,314)
Net Income (Loss)	(414,186)	(139,577)	(1,167,205)	(83,109)
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(16,746)	(51,154)	(98,334)	(200,364)
Realized Gain/(Loss)	734,894	235,343	571,048	498,398
Change in Unrealized Gain/(Loss)	(911,225)	(326,220)	(1,099,905)	(429,904)
Net Income (Loss)	(193,077)	(142,031)	(627,191)	(131,870)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(18,141)	(10,825)	(36,877)	(47,185)
Realized Gain/(Loss)	489,021	24,104	1,781,745	(114,597)
Change in Unrealized Gain/(Loss)	(189,474)	41,083	(263,870)	51,845
Net Income (Loss)	281,406	54,362	1,480,998	(109,937)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(18,205)	(9,027)	(39,203)	(28,612)
Realized Gain/(Loss)	359,073	10,939	1,170,183	(2,139)
Change in Unrealized Gain/(Loss)	(146,762)	20,972	(204,327)	29,425
Net Income (Loss)	194,106	22,884	926,653	(1,326)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions				(123)
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	49,989	(4,884)	336,666	(8,469)
Net Income (Loss)	49,989	(4,884)	336,666	(8,592)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions				(681)
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(40,791)	(90,105)	102,078	(145,612)
Net Income (Loss)	(40,791)	(90,105)	102,078	(146,293)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)				(62)
Change in Unrealized Gain/(Loss)	21,004	(2,350)	165,797	1,592
Net Income (Loss)	21,004	(2,350)	165,797	1,530
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(25,825)	(38,176)	(75,800)	(111,704)
Realized Gain/(Loss)	(82,440)	(205,387)	(1,019,048)	(813,565)
Change in Unrealized Gain/(Loss)	(70,768)	29,398	114,320	90,256
Net Income (Loss)	(179,033)	(214,165)	(980,528)	(835,013)
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(18,552)	(20,929)	(53,774)	(62,615)
Realized Gain/(Loss)	(47,540)	(92,636)	(620,976)	(428,811)
Change in Unrealized Gain/(Loss)	(43,774)	16,282	70,231	18,024
Net Income (Loss)	(109,866)	(97,283)	(604,519)	(473,402)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions		(10,502)	(25,311)	(73,053)
Realized Gain/(Loss)		37,958	24,230	(34,735)
Change in Unrealized Gain/(Loss)	(3,220)	(5,938)	(124,478)	6,431
Net Income (Loss)	(3,220)	21,518	(125,559)	(101,357)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions		(8,047)	(13,254)	(45,287)
Realized Gain/(Loss)		17,990	10,639	(7,954)
Change in Unrealized Gain/(Loss)		(2,619)	(7,477)	2,742
Net Income (Loss)		7,324	(10,092)	(50,499)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(5,556)	(6,575)	(12,342)	(20,503)
Realized Gain/(Loss)	49,061	(46,302)	94,895	(88,994)
Change in Unrealized Gain/(Loss)	(81,389)	6,537	(60,935)	9,703
Net Income (Loss)	(37,884)	(46,340)	21,618	(99,794)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(6,204)	(7,511)	(14,152)	(23,108)
Realized Gain/(Loss)	46,394	(46,302)	91,712	(89,102)
Change in Unrealized Gain/(Loss)	(71,948)	6,537	(51,421)	9,703
Net Income (Loss)	(31,758)	(47,276)	26,139	(102,507)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(16,734)	(38,085)	(62,382)	(175,522)
Realized Gain/(Loss)	624,290	46,290	1,610,738	(1,567,177)
Change in Unrealized Gain/(Loss)	(260,857)	67,221	(656,986)	154,073
Net Income (Loss)	346,699	75,426	891,370	(1,588,626)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Select Fund [Member]
Trading Commissions	(21,113)	(31,965)	(55,024)	(112,056)
Realized Gain/(Loss)	271,422	13,930	494,161	(80,517)
Change in Unrealized Gain/(Loss)	(171,309)	25,712	(218,377)	(182,320)
Net Income (Loss)	79,000	7,677	220,760	(374,893)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Heritage Fund [Member]
Trading Commissions	(19,282)	(33,189)	(68,969)	(128,567)
Realized Gain/(Loss)	210,449	14,991	494,538	(535,418)
Change in Unrealized Gain/(Loss)	(108,204)	22,315	(171,703)	67,067
Net Income (Loss)	82,963	4,117	253,866	(596,918)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(9,973)	(15,062)	(33,999)	(59,678)
Realized Gain/(Loss)	84,971	5,925	210,457	(230,562)
Change in Unrealized Gain/(Loss)	(38,123)	10,810	(82,652)	24,115
Net Income (Loss)	36,875	1,673	93,806	(266,125)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(13,631)	(20,337)	(47,633)	(92,781)
Realized Gain/(Loss)	396,481	21,164	1,000,463	(751,752)
Change in Unrealized Gain/(Loss)	(197,360)	31,504	(394,168)	54,921
Net Income (Loss)	185,490	32,331	558,662	(789,612)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(6,607)	(32,744)	(24,523)	(132,925)
Realized Gain/(Loss)	98,467	17,636	175,753	(709,314)
Change in Unrealized Gain/(Loss)	(58,877)	26,253	(10,967)	39,893
Net Income (Loss)	32,983	11,145	140,263	(802,346)
Frontier Trading Company XXXIX, LLC [Member] | Frontier Select Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	861	3,227	40,244	(38,351)
Net Income (Loss)	861	3,227	40,244	(38,351)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member] | Frontier Select Fund [Member]
Trading Commissions	(15,229)	(21,700)	(59,657)	(83,404)
Realized Gain/(Loss)	163,325	91,839	423,016	(433,416)
Change in Unrealized Gain/(Loss)	(80,638)	25,085	(153,951)	92,847
Net Income (Loss)	67,458	95,224	209,408	(423,973)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(11,578)	(17,623)	(50,514)	(64,811)
Realized Gain/(Loss)	153,702	95,172	368,511	7,178
Change in Unrealized Gain/(Loss)	(78,716)	21,795	(161,851)	(157,460)
Net Income (Loss)	63,408	99,344	156,146	(215,093)
Frontier Trading Company XXXVIII, LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	52,720
Net Income (Loss)	52,720
Frontier Trading Company XXXVIII, LLC [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,261)
Net Income (Loss)	(1,261)
Frontier Trading Company XXXVIII, LLC [Member] | Frontier Select Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,956)
Net Income (Loss)	(1,956)
Frontier Trading Company XXXVIII, LLC [Member] | Frontier Heritage Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,353)
Net Income (Loss)	(1,353)
Frontier Trading Company XXXVIII, LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,299)	2,127	(10,295)	307
Net Income (Loss)	$ (1,299)	2,127	$ (10,295)	307
Frontier Trading Company XXXVIII, LLC [Member] | Frontier Winton Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		154,297		88,092
Net Income (Loss)		154,297		88,092
Frontier Trading Company XV, LLC [Member] | Frontier Masters 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 II, LLC [Member] | Frontier Winton Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		2,568		(183,988)
Net Income (Loss)		$ 2,568		$ (183,988)

Investments in Unconsolidated_5

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member]	9 Months Ended
	Sep. 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 - Quantmetrics Feeder Fund (527) 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 - Quantmetrics Feeder Fund (527) 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] | 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 Investme

Investments in Private Investment Companies (Frontier Funds) (Details) - Frontier Funds [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Trading Commissions	$ (502,113)	$ (536,503)	$ (1,671,986)	$ (2,115,347)
Realized Gain/(Loss)	10,488,413	1,083,414	14,285,285	(4,462,044)
Change in Unrealized Gain/(Loss)	(9,139,197)	(1,454,761)	(8,699,130)	(1,713,225)
Net Income (Loss)	847,103	(907,850)	3,914,169	(8,290,616)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Trading Commissions	(196,670)	(13,448)	(465,857)	(81,572)
Realized Gain/(Loss)	2,747,191	(89,558)	5,447,312	(372,395)
Change in Unrealized Gain/(Loss)	(1,491,935)	130,963	(914,542)	140,200
Net Income (Loss)	1,058,586	27,957	4,066,913	(313,767)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Trading Commissions	(8,166)	(21,883)	(40,134)	(72,912)
Realized Gain/(Loss)	(13,867)	61,611	60,251	(167,998)
Change in Unrealized Gain/(Loss)	84,283	(36,452)	(43,518)	(34,229)
Net Income (Loss)	62,250	3,276	(23,401)	(275,139)
Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Trading Commissions	(90,647)	(178,875)	(492,581)	(700,233)
Realized Gain/(Loss)	4,938,413	1,104,050	2,466,705	2,033,337
Change in Unrealized Gain/(Loss)	(6,160,328)	(1,538,861)	(5,886,966)	(1,717,641)
Net Income (Loss)	(1,312,562)	(613,686)	(3,912,842)	(384,537)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Trading Commissions	(36,346)	(19,852)	(76,080)	(73,829)
Realized Gain/(Loss)	848,094	35,043	2,951,928	(116,736)
Change in Unrealized Gain/(Loss)	(336,236)	62,055	(468,197)	81,270
Net Income (Loss)	475,512	77,246	2,407,651	(109,295)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Trading Commissions				(804)
Realized Gain/(Loss)				(62)
Change in Unrealized Gain/(Loss)	30,202	(97,339)	604,541	(152,150)
Net Income (Loss)	30,202	(97,339)	604,541	(153,016)
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Trading Commissions	(44,377)	(59,105)	(129,574)	(174,274)
Realized Gain/(Loss)	(129,980)	(298,023)	(1,640,024)	(1,242,377)
Change in Unrealized Gain/(Loss)	(114,542)	45,680	184,551	108,280
Net Income (Loss)	(288,899)	(311,448)	(1,585,047)	(1,308,371)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Trading Commissions		(18,549)	(38,565)	(118,457)
Realized Gain/(Loss)		55,948	34,869	(42,689)
Change in Unrealized Gain/(Loss)	(3,220)	(8,557)	(131,955)	9,173
Net Income (Loss)	(3,220)	28,842	(135,651)	(151,973)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Trading Commissions	(11,760)	(14,086)	(26,494)	(43,536)
Realized Gain/(Loss)	95,455	(92,604)	186,607	(175,750)
Change in Unrealized Gain/(Loss)	(153,337)	13,074	(112,356)	19,406
Net Income (Loss)	(69,642)	(93,616)	47,757	(199,880)
Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)		(256,019)	(80,033)	(329,083)
Net Income (Loss)		(256,019)	(80,033)	(329,083)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Trading Commissions	(26,807)	(39,323)	(110,171)	(134,728)
Realized Gain/(Loss)	317,027	187,011	791,527	39,795
Change in Unrealized Gain/(Loss)	(159,354)	46,880	(315,802)	(286,272)
Net Income (Loss)	130,866	194,568	365,554	(381,205)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Trading Commissions	(87,340)	(171,382)	(292,530)	(715,002)
Realized Gain/(Loss)	1,686,080	119,936	3,986,110	(4,340,773)
Change in Unrealized Gain/(Loss)	(834,730)	183,815	(1,534,853)	379,408
Net Income (Loss)	$ 764,010	132,369	$ 2,158,727	(4,676,367)
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)

Investments in Private Invest_2

Investments in Private Investment Companies (Frontier Funds) (Details 1) - Frontier Funds [Member]	9 Months Ended
	Sep. 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 - Quantmetrics Feeder Fund (527) 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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Frontier Diversified Fund [Member]
Incentive (Rebate) Fees		$ 10,897		$ 12,778
Management Fee		13,113	2,668	37,905
Service Fee	11,313	14,432	34,708	45,236
Trading Fee	126,165	145,750	382,495	454,513
Frontier Masters Fund [Member]
Incentive (Rebate) Fees
Management Fee		22,605	7,665	83,816
Service Fee	1,256	11,605	11,010	39,503
Trading Fee	49,626	95,225	175,662	335,271
Frontier Long/Short Commodity Fund [Member]
Incentive (Rebate) Fees
Management Fee
Risk Analysis Fees		334
Service Fee	134	334	448	1,398
Trading Fee	14,443	19,318	42,660	65,530
Frontier Balanced Fund [Member]
Incentive (Rebate) Fees				145,134
Management Fee	4,614	26,643	17,979	69,545
Risk Analysis Fees	145,900	222,302	470,826	723,093
Service Fee	236,156	339,537	763,616	1,068,482
Frontier Select Fund [Member]
Incentive (Rebate) Fees
Management Fee
Risk Analysis Fees
Service Fee	27,710	32,149	79,777	105,111
Trading Fee	21,767	27,076	66,874	92,779
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Incentive (Rebate) Fees
Management Fee		104,062	38,679	366,404
Risk Analysis Fees		252,006		252,006
Service Fee	45,272	(175,167)	140,174
Trading Fee	82,029	73,379	207,342	236,657
Frontier Heritage Fund [Member]
Incentive (Rebate) Fees				1,394
Management Fee		22,635	7,289	92,509
Risk Analysis Fees		97,753		97,753
Service Fee	22,197	(68,410)	66,095
Trading Fee	$ 31,932	$ 33,624	$ 88,678	$ 112,771

Transactions with Affiliates _3

Transactions with Affiliates (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Incentive Fees		$ 10,897
Management Fees		3,875
Interest Fees
Service Fees	2,215	4,498
Trading Fees Payable	40,014	44,827
Risk Analysis Fees
Frontier Masters Fund [Member]
Incentive Fees
Management Fees		8,347
Interest Fees
Service Fees		1,750
Trading Fees Payable	117	27,984
Risk Analysis Fees
Frontier Long/Short Commodity Fund [Member]
Incentive Fees
Management Fees
Interest Fees
Service Fees	(37)	51
Trading Fees Payable		5,306
Risk Analysis Fees
Frontier Balanced Fund [Member]
Incentive Fees
Management Fees	8,669	13,917
Interest Fees	246	1,490
Service Fees	42,253	56,791
Trading Fees Payable	76,517	101,770
Risk Analysis Fees	9,429
Frontier Select Fund [Member]
Incentive Fees
Management Fees
Interest Fees	282
Service Fees	8,387	8,575
Trading Fees Payable	7,443	7,812
Risk Analysis Fees
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Incentive Fees
Management Fees		42,705
Interest Fees	278	8,124
Service Fees	13,503	17,803
Trading Fees Payable	29,967	24,353
Risk Analysis Fees
Frontier Heritage Fund [Member]
Incentive Fees
Management Fees		9,201
Interest Fees	474	1,238
Service Fees	6,334	6,684
Trading Fees Payable	12,389	$ 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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Managing Owner [Member]
Gross Amount Paid to the Managing Owner	$ 6,776	$ 11,804	$ 40,684	$ 112,772
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	$ 5	$ 4	$ 14	$ 41
Ratio to Average Net Assets	0.01%	0.00%	0.02%	0.02%
Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Gross Amount Paid to the Managing Owner	$ 129	$ 55	$ 337	$ 543
Ratio to Average Net Assets	0.01%	0.00%	0.02%	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	$ 877	$ 4,688	$ 3,758	$ 19,340
Ratio to Average Net Assets	0.00%	0.01%	0.02%	0.06%
Frontier Balanced Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 178	$ 848	$ 733	$ 3,504
Ratio to Average Net Assets	0.00%	0.01%	0.02%	0.06%
Frontier Balanced Fund [Member] | Class 2a [Member]
Gross Amount Paid to the Managing Owner	$ 2	$ 12	$ 9	$ 51
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.01%
Frontier Balanced Fund [Member] | Class 3a [Member]
Gross Amount Paid to the Managing Owner	$ 8	$ 31	$ 31	$ 139
Ratio to Average Net Assets	0.00%	0.00%	0.00%	0.01%
Frontier Balanced Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 17	$ 85	$ 62	$ 341
Ratio to Average Net Assets	0.00%	0.02%	0.02%	0.06%
Frontier Select Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 2,364	$ 228	$ 4,623	$ 6,063
Ratio to Average Net Assets	0.06%	0.00%	0.13%	0.13%
Frontier Select Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 73	$ 20	$ 144	$ 744
Ratio to Average Net Assets	0.06%	0.00%	0.13%	0.13%
Frontier Select Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 8	$ 1	$ 11	$ 26
Ratio to Average Net Assets	0.06%	0.01%	0.16%	0.13%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 1,236	$ 5,024	$ 23,596	$ 67,727
Ratio to Average Net Assets	0.02%	0.04%	0.38%	0.60%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 87	$ 310	$ 1,373	$ 7,338
Ratio to Average Net Assets	0.02%	0.03%	0.34%	0.65%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 8	$ 18	$ 113	$ 212
Ratio to Average Net Assets	0.02%	0.05%	0.32%	0.59%
Frontier Heritage Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 1,457	$ 412	$ 4,881	$ 5,794
Ratio to Average Net Assets	0.05%	0.01%	0.17%	0.13%
Frontier Heritage Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 322	$ 68	$ 991	$ 904
Ratio to Average Net Assets	0.05%	0.01%	0.16%	0.13%
Frontier Heritage Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 5		$ 8	$ 5
Ratio to Average Net Assets	0.05%	0.00%	0.16%	0.14%

Transactions with Affiliates _5

Transactions with Affiliates (The Series of the Frontier Funds) (Details Narrative) - The Series of the Frontier Funds [Member] - USD ($)	9 Months Ended	12 Months Ended
	Sep. 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	$ 308,541
Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	163
Frontier Diversified Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	117,449
Frontier Masters Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	31,758
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	55,344
Frontier Heritage Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	55,344
Frontier Select Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 15,722
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) - Managing Owner [Member] - Frontier Funds [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
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	8,669		8,669		78,045
Trust had payable for interest fees	1,243		1,243		10,852
Trust had payable for service fees	72,809		72,809		96,152
Trust had payable for risk analysis fees	9,429		9,429
Trust had payable for trading fees	187,827		187,827		$ 222,241
Trust paid for incentive fees	0	$ 10,897	0	$ 159,306
Trust paid for management fees	4,614	189,058	74,280	650,179
Trust paid for risk analysis fees	1,385		4,257
Trust paid for service fees	253,782	387,003	803,038	1,264,101
Trust paid for trading fees	562,118	733,788	$ 1,727,327	$ 2,366,003
Trust paid	$ 6,766	$ 55,400
Class 1 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	3.00%		3.00%
Class 1a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	2.00%		2.00%
Class 2 Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	0.25%		0.25%
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%
Frontier Balanced Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%		1.00%
Frontier Balanced Fund [Member] | Swap [Member] | Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%		25.00%
Frontier Balanced Fund [Member] | Swap [Member] | Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%		20.00%
Frontier Balanced Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Frontier Balanced Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
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%
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%
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%
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%
Frontier Long/Short Commodity Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Frontier Long/Short Commodity Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
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%
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%
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%
Frontier Diversified Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%		1.00%
Frontier Diversified Fund [Member] | Swap [Member] | Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%		25.00%
Frontier Diversified Fund [Member] | Swap [Member] | Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%		20.00%
Frontier Diversified Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Frontier Diversified Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
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%
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%
Frontier Masters Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
Frontier Masters Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest			1.00%
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%
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%
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%
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%
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				9 Months Ended
		Sep. 30, 2019		Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018
Frontier Diversified Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 102.44		$ 108.30		$ 102.25		$ 116.41
Interest income	[1]	0.01		0.06		0.06		0.16
Expenses	[1]	(1.69)		(1.83)		(5.12)		(3.19)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.96		(2.07)		5.54		(8.92)
Net income/(loss)	[1]	0.28		(3.84)		0.47		(11.95)
Net asset value	[1]	$ 102.72		$ 104.46		$ 102.72		$ 104.46
Net investment income/(loss)		(6.57%)		(6.52%)		(6.65%)		(3.73%)
Expenses before incentive fees	[2],[3]	6.62%		6.67%		6.72%		3.86%
Expenses after incentive fees	[2],[3]	6.62%		6.73%		6.72%		3.93%
Total return before incentive fee	[4]	0.27%		(3.48%)		0.46%		(10.20%)
Total return after incentive fees	[4]	0.27%		(3.55%)		0.46%		(10.27%)
Frontier Diversified Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 122.11		$ 126.87		$ 120.84		$ 135.19
Interest income	[1]	0.01		0.07		0.07		0.19
Expenses	[1]	(1.12)		(1.19)		(3.35)		(3.72)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.98		(2.83)		5.42		(8.74)
Net income/(loss)	[1]	0.87		(3.96)		2.14		(12.28)
Net asset value	[1]	$ 122.98		$ 122.91		$ 122.98		$ 122.91
Net investment income/(loss)		(3.64%)		(3.45%)		(3.63%)		(3.73%)
Expenses before incentive fees	[2],[3]	3.69%		3.60%		3.70%		3.86%
Expenses after incentive fees	[2],[3]	3.69%		3.66%		3.70%		3.93%
Total return before incentive fee	[4]	0.71%		(3.06%)		1.77%		(9.01%)
Total return after incentive fees	[4]	0.71%		(3.12%)		1.77%		(9.08%)
Frontier Diversified Fund [Member] | Class 3 [Member]
Net asset value	[1]	$ 113.96		$ 118.09		$ 112.62		$ 125.68
Interest income	[1]	0.01		0.06		0.06		0.17
Expenses	[1]	(1.05)		(1.11)		(3.13)		(3.47)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.91		(2.57)		5.29		(7.92)
Net income/(loss)	[1]	0.88		(3.62)		2.22		(11.21)
Net asset value	[1]	$ 114.84		$ 114.47		$ 114.84		$ 114.47
Net investment income/(loss)		(3.64%)		(3.45%)		(3.63%)		(3.73%)
Expenses before incentive fees	[2],[3]	3.69%		3.60%		3.70%		3.86%
Expenses after incentive fees	[2],[3]	3.69%		3.66%		3.70%		3.93%
Total return before incentive fee	[4]	0.76%		(3.00%)		1.97%		(8.85%)
Total return after incentive fees	[4]	0.76%		(3.07%)		1.97%		(8.92%)
Frontier Masters Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 87.33		$ 99.33		$ 91.1		$ 114.74
Interest income	[1]	0.05		0.07		0.09		0.25
Expenses	[1]	(1.53)		(2.16)		(5.44)		(5.44)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.12)		(0.03)		(1.02)		(12.35)
Net income/(loss)	[1]	(2.60)		(2.13)		(6.37)		(17.54)
Net asset value	[1]	$ 84.73		$ 97.2		$ 84.73		$ 97.2
Net investment income/(loss)		(6.61%)		(8.57%)		(8.37%)		(6.92%)
Expenses before incentive fees	[2],[3]	6.84%		8.83%		8.51%		7.26%
Expenses after incentive fees	[2],[3]	6.84%		8.83%		8.51%		7.26%
Total return before incentive fee	[4]	(2.97%)		(2.14%)		(6.99%)		(15.29%)
Total return after incentive fees	[4]	(2.97%)		(2.14%)		(6.99%)		(15.29%)
Frontier Masters Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 104.1		$ 116.38		$ 107.68		$ 133.27
Interest income	[1]	0.06		0.08		0.11		0.3
Expenses	[1]	(1.37)		(1.91)		(4.68)		(6.43)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.04)		(0.15)		(1.36)		(12.75)
Net income/(loss)	[1]	(2.35)		(1.99)		(5.93)		(18.88)
Net asset value	[1]	$ 101.75		$ 114.39		$ 101.75		$ 114.39
Net investment income/(loss)		(4.94%)		(6.38%)		(5.87%)		(6.92%)
Expenses before incentive fees	[2],[3]	5.17%		6.65%		6.01%		7.26%
Expenses after incentive fees	[2],[3]	5.17%		6.65%		6.01%		7.26%
Total return before incentive fee	[4]	(2.26%)		(1.71%)		(5.51%)		(14.17%)
Total return after incentive fees	[4]	(2.26%)		(1.71%)		(5.51%)		(14.17%)
Frontier Masters Fund [Member] | Class 3 [Member]
Net asset value	[1]	$ 97.53		$ 108.77		$ 100.77		$ 124.4
Interest income	[1]	0.06		0.07		0.1		0.28
Expenses	[1]	(1.28)		(1.79)		(4.38)		(5.97)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(0.91)		(0.06)		(1.1)		(11.72)
Net income/(loss)	[1]	(2.14)		(1.78)		(5.38)		(17.41)
Net asset value	[1]	$ 95.39		$ 106.99		$ 95.39		$ 106.99
Net investment income/(loss)		(4.94%)		(6.38%)		(5.87%)		(6.92%)
Expenses before incentive fees	[2],[3]	5.17%		6.65%		6.01%		7.26%
Expenses after incentive fees	[2],[3]	5.17%		6.65%		6.01%		7.26%
Total return before incentive fee	[4]	(2.19%)		(1.64%)		(5.34%)		(14.00%)
Total return after incentive fees	[4]	(2.19%)		(1.64%)		(5.34%)		(14.00%)
Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 98.52		$ 106.52		$ 98.82		$ 115.81
Interest income	[1]	0.03		0.11		0.08		0.33
Expenses	[1]	(0.66)		(0.64)		(1.92)		(2.06)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(9.13)		(2.44)		(8.22)		(10.54)
Net income/(loss)	[1]	(9.76)		(2.98)		(10.06)		(12.27)
Net asset value	[1]	$ 88.76		$ 103.54		$ 88.76		$ 103.54
Net investment income/(loss)		(2.57%)		(2.04%)		(2.58%)		(2.08%)
Expenses before incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Expenses after incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Total return before incentive fee	[4]	(9.91%)		(2.80%)		(10.18%)		(10.59%)
Total return after incentive fees	[4]	(9.91%)		(2.80%)		(10.18%)		(10.59%)
Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Net asset value	[1]	$ 103.34		$ 111.75		$ 103.66		$ 121.5
Interest income	[1]	0.03		0.11		0.09		0.34
Expenses	[1]	(0.69)		(0.67)		(2.02)		(2.15)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(9.52)		(2.57)		(8.56)		(11.08)
Net income/(loss)	[1]	(10.18)		(3.13)		(10.5)		(12.88)
Net asset value	[1]	$ 93.16		$ 108.62		$ 93.16		$ 108.62
Net investment income/(loss)		(2.57%)		(2.04%)		(2.58%)		(2.08%)
Expenses before incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Expenses after incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Total return before incentive fee	[4]	(9.85%)		(2.80%)		(10.13%)		(10.60%)
Total return after incentive fees	[4]	(9.85%)		(2.80%)		(10.13%)		(10.60%)
Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
Net asset value	[1]	$ 52.86		$ 70.78		$ 56.8		$ 81.35
Interest income	[1]	0.02		0.07		0.04		0.23
Expenses	[1]	(0.76)		(1.15)		(2.45)		(1.43)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(4.53)		(3.5)		(6.83)		(13.96)
Net income/(loss)	[1]	(5.30)		(4.59)		(9.24)		(15.16)
Net asset value	[1]	$ 47.56		$ 66.19		$ 47.56		$ 66.19
Net investment income/(loss)		(5.71%)		(6.44%)		(6.35%)		(2.08%)
Expenses before incentive fees	[2],[3]	5.84%		6.84%		6.46%		2.47%
Expenses after incentive fees	[2],[3]	5.84%		6.84%		6.46%		2.47%
Total return before incentive fee	[4]	(9.99%)		(6.48%)		(16.27%)		(18.64%)
Total return after incentive fees	[4]	(9.99%)		(6.48%)		(16.27%)		(18.64%)
Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
Net asset value	[1]	$ 62.24		$ 82.13		$ 66.52		$ 93.59
Interest income	[1]	0.02		0.08		0.05		0.26
Expenses	[1]	(0.42)		(0.48)		(1.21)		(1.62)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(5.54)		(4.58)		(9.06)		(15.08)
Net income/(loss)	[1]	(5.94)		(4.98)		(10.22)		(16.44)
Net asset value	[1]	$ 56.3		$ 77.15		$ 56.3		$ 77.15
Net investment income/(loss)		(2.57%)		(2.04%)		(2.58%)		(2.08%)
Expenses before incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Expenses after incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Total return before incentive fee	[4]	(9.54%)		(6.06%)		(15.36%)		(17.57%)
Total return after incentive fees	[4]	(9.54%)		(6.06%)		(15.36%)		(17.57%)
Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
Net asset value	[1]	$ 65.45		$ 86.11		$ 69.83		$ 97.99
Interest income	[1]	0.02		0.08		0.05		0.27
Expenses	[1]	(0.45)		(0.5)		(1.28)		(1.7)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(5.78)		(4.75)		(9.37)		(15.62)
Net income/(loss)	[1]	(6.21)		(5.17)		(10.59)		(17.05)
Net asset value	[1]	$ 59.24		$ 80.94		$ 59.24		$ 80.94
Net investment income/(loss)		(2.57%)		(2.04%)		(2.58%)		(2.08%)
Expenses before incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Expenses after incentive fees	[2],[3]	2.70%		2.45%		2.70%		2.47%
Total return before incentive fee	[4]	(9.49%)		(6.00%)		(15.17%)		(17.40%)
Total return after incentive fees	[4]	(9.49%)		(6.00%)		(15.17%)		(17.40%)
Frontier Balanced Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 116.36		$ 125.21		$ 117.63		$ 135.96
Interest income	[1]	0.05		0.04		0.16		0.11
Expenses	[1]	(1.9)		(2.14)		(6.03)		(6.82)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.18		(3.3)		4.94		(9.44)
Net income/(loss)	[1]	0.33		(5.4)		(0.94)		(16.15)
Net asset value	[1]	$ 116.69		$ 119.81		$ 116.69		$ 119.81
Net investment income/(loss)		(6.29%)		(6.89%)		(6.77%)		(7.05%)
Expenses before incentive fees	[2],[3]	6.47%		7.01%		6.96%		6.81%
Expenses after incentive fees	[2],[3]	6.47%		7.01%		6.96%		7.17%
Total return before incentive fee	[4]	0.28%		(4.31%)		(0.80%)		(11.52%)
Total return after incentive fees	[4]	0.28%		(4.31%)		(0.80%)		(11.88%)
Frontier Balanced Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 181.66		$ 189.72		$ 180.94		$ 202.9
Interest income	[1]	0.08		0.05		0.25		0.17
Expenses	[1]	(1.67)		(1.86)		(5.34)		(6.06)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.49		(5.01)		7.71		(14.11)
Net income/(loss)	[1]	1.9		(6.82)		2.62		(20)
Net asset value	[1]	$ 183.56		$ 182.9		$ 183.56		$ 182.9
Net investment income/(loss)		(3.48%)		(3.89%)		(3.77%)		(4.05%)
Expenses before incentive fees	[2],[3]	3.66%		4.01%		3.95%		3.81%
Expenses after incentive fees	[2],[3]	3.66%		4.01%		3.95%		4.17%
Total return before incentive fee	[4]	1.05%		(3.59%)		1.45%		(9.50%)
Total return after incentive fees	[4]	1.05%		(3.59%)		1.45%		(9.86%)
Frontier Balanced Fund [Member] | Class 2a [Member]
Net asset value	[1]	$ 157.49		$ 164.33		$ 156.81		$ 175.77
Interest income	[1]	0.07		0.05		0.21		0.15
Expenses	[1]	(1.45)		(1.61)		(4.62)		(5.26)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.96		(4.29)		6.66		(12.18)
Net income/(loss)	[1]	1.58		(5.85)		2.26		(17.29)
Net asset value	[1]	$ 159.07		$ 158.48		$ 159.07		$ 158.48
Net investment income/(loss)		(3.48%)		(3.89%)		(3.77%)		(4.05%)
Expenses before incentive fees	[2],[3]	3.66%		4.01%		3.95%		3.81%
Expenses after incentive fees	[2],[3]	3.66%		4.01%		3.95%		4.17%
Total return before incentive fee	[4]	1.00%		(3.56%)		1.44%		(9.48%)
Total return after incentive fees	[4]	1.00%		(3.56%)		1.44%		(9.84%)
Frontier Balanced Fund [Member] | Class 3a [Member]
Net asset value	[1]	$ 156.91		$ 163.77		$ 156.26		$ 175.18
Interest income	[1]	0.07		0.05		0.21		0.14
Expenses	[1]	(1.44)		(1.6)		(4.62)		(5.24)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.01		(4.27)		6.69		(12.15)
Net income/(loss)	[1]	1.64		(5.83)		2.29		(17.24)
Net asset value	[1]	$ 158.55		$ 157.94		$ 158.55		$ 157.94
Net investment income/(loss)		(3.48%)		(3.89%)		(3.77%)		(4.05%)
Expenses before incentive fees	[2],[3]	3.66%		4.01%		3.95%		3.81%
Expenses after incentive fees	[2],[3]	3.66%		4.01%		3.95%		4.17%
Total return before incentive fee	[4]	1.05%		(3.56%)		1.47%		(9.48%)
Total return after incentive fees	[4]	1.05%		(3.56%)		1.47%		(9.84%)
Frontier Balanced Fund [Member] | Class 1AP [Member]
Net asset value	[1]	$ 134.69		$ 140.68		$ 134.16		$ 150.56
Interest income	[1]	0.06		0.04		0.18		0.12
Expenses	[1]	(1.24)		(1.38)		(3.97)		(4.49)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.59		(3.71)		5.72		(10.57)
Net income/(loss)	[1]	1.41		(5.05)		1.94		(14.93)
Net asset value	[1]	$ 136.1		$ 135.63		$ 136.1		$ 135.63
Net investment income/(loss)		(3.48%)		(3.89%)		(3.77%)		(4.05%)
Expenses before incentive fees	[2],[3]	3.66%		4.01%		3.95%		3.81%
Expenses after incentive fees	[2],[3]	3.66%		4.01%		3.95%		4.17%
Total return before incentive fee	[4]	1.05%		(3.59%)		1.45%		(9.55%)
Total return after incentive fees	[4]	1.05%		(3.59%)		1.45%		(9.92%)
Frontier Select Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 76.03		$ 74.75		$ 71.41		$ 90.27
Interest income	[1]	0		0		0		0
Expenses	[1]	(1.01)		(1.01)		(2.98)		(3.15)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.74		1.67		9.33		(11.71)
Net income/(loss)	[1]	1.73		0.66		6.35		(14.86)
Net asset value	[1]	$ 77.76		$ 75.41		$ 77.76		$ 75.41
Net investment income/(loss)		(5.45%)		(5.36%)		(5.44%)		(5.37%)
Expenses before incentive fees	[2],[3]	5.45%		5.36%		5.44%		5.37%
Expenses after incentive fees	[2],[3]	5.45%		5.36%		5.44%		5.37%
Total return before incentive fee	[4]	2.28%		0.88%		8.89%		(16.46%)
Total return after incentive fees	[4]	2.28%		0.88%		8.89%		(16.46%)
Frontier Select Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 116.96		$ 111.56		$ 108.18		$ 132.73
Interest income	[1]	0		0		0		0
Expenses	[1]	(0.67)		(0.67)		(2.04)		(2.1)
Net gain/(loss) on investments, net of non-controlling interests	[1]	4.23		2.51		14.38		(17.22)
Net income/(loss)	[1]	3.56		1.84		12.34		(19.32)
Net asset value	[1]	$ 120.52		$ 113.41		$ 120.52		$ 113.41
Net investment income/(loss)		(2.36%)		(2.36%)		(2.44%)		(2.37%)
Expenses before incentive fees	[2],[3]	2.36%		2.36%		2.43%		2.37%
Expenses after incentive fees	[2],[3]	2.36%		2.36%		2.43%		2.37%
Total return before incentive fee	[4]	3.04%		1.65%		11.41%		(14.56%)
Total return after incentive fees	[4]	3.04%		1.65%		11.41%		(14.56%)
Frontier Select Fund [Member] | Class 1AP [Member]
Net asset value	[1]	$ 88.34		$ 84.07		$ 82.48		$ 100.02
Interest income	[1]	0		0		0		0
Expenses	[1]	(0.51)		(0.5)		(1.63)		(1.56)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.2		1.88		10.18		(13.01)
Net income/(loss)	[1]	2.69		1.38		8.55		(14.57)
Net asset value	[1]	$ 91.03		$ 85.45		$ 91.03		$ 85.45
Net investment income/(loss)		(2.36%)		(2.36%)		(2.43%)		(2.37%)
Expenses before incentive fees	[2],[3]	2.36%		2.36%		2.43%		2.37%
Expenses after incentive fees	[2],[3]	2.36%		2.36%		2.43%		2.37%
Total return before incentive fee	[4]	3.05%		1.64%		10.37%		(14.57%)
Total return after incentive fees	[4]	3.05%		1.64%		10.37%		(14.57%)
Frontier Global Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 143.64
Interest income	[1]	0
Expenses	[1]	(2.98)
Net gain/(loss) on investments, net of non-controlling interests	[1]	11.36
Net income/(loss)	[1]	8.38
Net asset value	[1]	$ 152.02				$ 152.02
Net investment income/(loss)		(8.43%)
Expenses before incentive fees	[2],[3]	(8.43%)
Expenses after incentive fees	[2],[3]	(8.43%)
Total return before incentive fee	[4]	(8.43%)
Total return after incentive fees	[4]	(8.43%)
Frontier Global Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 207.48
Interest income	[1]	0
Expenses	[1]	(2.69)
Net gain/(loss) on investments, net of non-controlling interests	[1]	16.41
Net income/(loss)	[1]	13.72
Net asset value	[1]	$ 221.2				221.2
Net investment income/(loss)		(5.29%)
Expenses before incentive fees	[2],[3]	5.29%
Expenses after incentive fees	[2],[3]	5.29%
Total return before incentive fee	[4]	6.61%
Total return after incentive fees	[4]	6.61%
Frontier Global Fund [Member] | Class 1AP [Member]
Net asset value	[1]	$ 166.13
Interest income	[1]	0
Expenses	[1]	(2.16)
Net gain/(loss) on investments, net of non-controlling interests	[1]	13.19
Net income/(loss)	[1]	11.03
Net asset value	[1]	$ 177.16				177.16
Net investment income/(loss)		(5.29%)
Expenses before incentive fees	[2],[3]	5.29%
Expenses after incentive fees	[2],[3]	5.29%
Total return before incentive fee	[4]	6.64%
Total return after incentive fees	[4]	6.64%
Frontier Heritage Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 109.6		$ 102.68		99.83		$ 121.19
Interest income	[1]	0		0		0		0
Expenses	[1]	(1.81)		(2.04)		(5.13)		(6.79)
Net gain/(loss) on investments, net of non-controlling interests	[1]	5.14		0.46		18.23		(13.31)
Net income/(loss)	[1]	3.33		(1.58)		13.1		(20.10)
Net asset value	[1]	$ 112.93	[5]	$ 101.09		$ 112.93	[5]	$ 101.09
Net investment income/(loss)		(6.96%)		(7.93%)		(6.62%)		(8.46%)
Expenses before incentive fees	[2],[3]	6.96%		7.93%		6.62%		8.44%
Expenses after incentive fees	[2],[3]	6.96%		7.93%		6.62%		8.46%
Total return before incentive fee	[4]	3.04%		(1.54%)		13.12%		(16.56%)
Total return after incentive fees	[4]	3.04%		(1.54%)		13.12%		(16.59%)
Frontier Heritage Fund [Member] | Class 2 [Member]
Net asset value		$ 169.96	[1]	$ 154.54	[1]	$ 152.53	[1]	$ 179.7
Interest income		0	[1]	0	[1]	0	[1]	0
Expenses		(1.51)	[1]	(1.91)	[1]	(4.35)	[1]	(6.56)
Net gain/(loss) on investments, net of non-controlling interests		8.03	[1]	0.68	[1]	28.3	[1]	(19.83)
Net income/(loss)		6.52	[1]	(1.23)	[1]	23.95	[1]	(26.39)
Net asset value	[1]	$ 176.48	[5]	$ 153.31		$ 176.48	[5]	$ 153.31
Net investment income/(loss)		(3.77%)		(4.93%)		(3.61%)		(5.47%)
Expenses before incentive fees	[2],[3]	3.77%		4.93%		3.61%		5.44%
Expenses after incentive fees	[2],[3]	3.77%		4.93%		3.61%		5.47%
Total return before incentive fee	[4]	3.84%		(0.80%)		15.70%		(14.66%)
Total return after incentive fees	[4]	3.84%		(0.80%)		15.70%		(14.69%)
Frontier Heritage Fund [Member] | Class 1AP [Member]
Net asset value	[1]	$ 126.34		$ 115.46		$ 111.78		$ 134.28
Interest income	[1]	0		0		0		0
Expenses	[1]	(1.16)		(1.43)		(3.49)		(5)
Net gain/(loss) on investments, net of non-controlling interests	[1]	5.98		0.55		22.87		(14.70)
Net income/(loss)	[1]	4.82		(0.88)		19.38		(19.70)
Net asset value	[1]	$ 131.16	[5]	$ 114.58		$ 131.16	[5]	$ 114.58
Net investment income/(loss)		(3.77%)		(4.93%)		(3.61%)		(5.47%)
Expenses before incentive fees	[2],[3]	3.77%		4.93%		3.61%		5.44%
Expenses after incentive fees	[2],[3]	3.77%		4.93%		3.61%		5.47%
Total return before incentive fee	[4]	3.82%		(0.76%)		17.34%		(14.64%)
Total return after incentive fees	[4]	3.82%		(0.76%)		17.34%		(14.67%)
Frontier Global Fund (formerly Winton Fund) [Member] | Class 1 [Member]
Net asset value	[1]			$ 148.66		$ 131.57		$ 159.08
Interest income	[1]			0		0		0
Expenses	[1]			(3.55)		(8.33)		(10.70)
Net gain/(loss) on investments, net of non-controlling interests	[1]			0.91		28.78		(2.36)
Net income/(loss)	[1]			(2.64)		20.45		(13.06)
Net asset value	[1]	$ 152.02		$ 146.02		$ 152.02		$ 146.02
Net investment income/(loss)				(9.49%)		(7.93%)		(9.52%)
Expenses before incentive fees	[2],[3]			9.49%		7.93%		9.52%
Expenses after incentive fees	[2],[3]			9.49%		7.93%		9.52%
Total return before incentive fee	[4]			(1.78%)		15.54%		(8.21%)
Total return after incentive fees	[4]			(1.78%)		15.54%		(8.21%)
Frontier Global Fund (formerly Winton Fund) [Member] | Class 2 [Member]
Net asset value	[1]			$ 203.47		$ 187.17		$ 216.5
Interest income	[1]			0		0		0
Expenses	[1]			(3.63)		(7.5)		(10.43)
Net gain/(loss) on investments, net of non-controlling interests	[1]			6.36		41.53		0.13
Net income/(loss)	[1]			2.73		34.03		(10.30)
Net asset value	[1]	221.2		$ 206.2		$ 221.2		$ 206.2
Net investment income/(loss)				(6.49%)		(4.93%)		(6.52%)
Expenses before incentive fees	[2],[3]			6.49%		4.93%		6.52%
Expenses after incentive fees	[2],[3]			6.49%		4.93%		6.52%
Total return before incentive fee	[4]			1.34%		18.18%		(4.76%)
Total return after incentive fees	[4]			1.34%		18.18%		(4.76%)
Frontier Global Fund (formerly Winton Fund) [Member] | Class 1AP [Member]
Net asset value	[1]			$ 167.19		$ 149.92		$ 176.44
Interest income	[1]			0		0		0
Expenses	[1]			(2.74)		(6.05)		(8.20)
Net gain/(loss) on investments, net of non-controlling interests	[1]			1.06		33.29		(2.73)
Net income/(loss)	[1]			(1.68)		27.24		(10.93)
Net asset value	[1]	$ 177.16		$ 165.51		$ 177.16		$ 165.51
Net investment income/(loss)				(6.49%)		(4.93%)		(6.52%)
Expenses before incentive fees	[2],[3]			6.49%		4.93%		6.52%
Expenses after incentive fees	[2],[3]			6.49%		4.93%		6.52%
Total return before incentive fee	[4]			(1.00%)		18.17%		(6.19%)
Total return after incentive fees	[4]			(1.00%)		18.17%		(6.19%)
[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.
[5]	Annualized with the exception of incentive fees.

Financial Highlights ( Frontier

Financial Highlights ( Frontier Funds) (Details 1) - Frontier Funds [Member]		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net investment income/(loss)	[1]	(5.29%)	(6.10%)	(5.56%)	(6.07%)
Expenses before incentive fees	[1],[2],[3]	5.40%	6.37%	(5.73%)	6.15%
Expenses after incentive fees	[1],[2],[3]	5.40%	6.38%	(5.73%)	6.32%
Total return before incentive fee	[4]	0.90%	(3.17%)	1.97%	(13.04%)
Total return after incentive fees	[4]	0.90%	(3.18%)	1.97%	(13.20%)
[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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Numbers of Instruments Bought	138	231	617	1,753
Derivative Numbers of Instruments Sold	246	231	827	1,749

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		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Realized trading income/(loss)		$ 3,909,302	$ 355,161	$ 4,987,532	$ (2,121,678)
Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(92,058)	13,124	165,840	(270,212)
Realized Trading Revenue from Futures, Forwards and Options [Member] | Agriculturals [Member]
Realized trading income/(loss)		(54,047)	(26,065)	9,985	24,718
Realized Trading Revenue from Futures, Forwards and Options [Member] | Currencies [Member]
Realized trading income/(loss)		(161,381)	8,349	(280,156)	(190,681)
Realized Trading Revenue from Futures, Forwards and Options [Member] | Energies [Member]
Realized trading income/(loss)		(13,734)	(18,352)	(211)	42,905
Realized Trading Revenue from Futures, Forwards and Options [Member] | Interest rates [Member]
Realized trading income/(loss)		148,301	(64,465)	46,084	(161,677)
Realized Trading Revenue from Futures, Forwards and Options [Member] | Metals [Member]
Realized trading income/(loss)		44,521	122,534	58,195	16,990
Realized Trading Revenue from Futures, Forwards and Options [Member] | Stock indices [Member]
Realized trading income/(loss)		$ (55,718)	$ (8,877)	$ (61,336)	$ (2,467)
[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		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Change in unrealized trading income/(loss)		$ (3,534,803)	$ (476,310)	$ (3,686,778)	$ (227,908)
Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(28,271)	(63,530)	(224,786)	(141,192)
Unrealized Trading Revenue from Futures, Forwards and Options [Member] | Agriculturals [Member]
Change in unrealized trading income/(loss)		3,305	38,061	3,305	(5,035)
Unrealized Trading Revenue from Futures, Forwards and Options [Member] | Currencies [Member]
Change in unrealized trading income/(loss)		47,292	(83,636)	(63,185)	(185,045)
Unrealized Trading Revenue from Futures, Forwards and Options [Member] | Energies [Member]
Change in unrealized trading income/(loss)		4,480	6,294	20,847	(45,184)
Unrealized Trading Revenue from Futures, Forwards and Options [Member] | Interest rates [Member]
Change in unrealized trading income/(loss)		(81,857)	(24,837)	(89,117)	87,216
Unrealized Trading Revenue from Futures, Forwards and Options [Member] | Metals [Member]
Change in unrealized trading income/(loss)		19,396	(10,838)	(80,268)	12,286
Unrealized Trading Revenue from Futures, Forwards and Options [Member] | Stock indices [Member]
Change in unrealized trading income/(loss)		$ (20,887)	$ 11,426	$ (16,368)	$ (5,450)
[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 ($)	Sep. 30, 2019	Dec. 31, 2018
Frontier Balanced Fund [Member] | Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 74,110	$ 3,489
Gross Amounts offset in the Statements of Financial	(48,926)	(128,220)
Net Amounts Presented in the Statements of Financial Condition	25,184	220,659
Frontier Balanced Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	11,149,055	107,949
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	11,149,055	10,794,908
Frontier Diversified Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	60,744	5,920,414
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	6,074,428	5,920,414
Frontier Long/Short Commodity Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	3,841	479,102
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	384,138	479,102
Frontier Heritage Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	30,384	2,955,444
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 3,038,450	$ 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]	Sep. 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		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Realized trading income/(loss)		$ 10,488,413	$ 1,083,414	$ 14,285,285	$ (4,462,044)
Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(92,058)	1,175,855	(1,190,910)	1,136,964
Agriculturals [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		(54,047)	198,513	(4,956)	287,301
Currencies [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		(161,381)	520,493	(852,338)	(985,268)
Energies [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		(13,734)	(25,579)	(606,626)	1,048,526
Interest rates [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		148,301	(298,384)	1,013,511	1,723
Metals [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		44,521	234,519	(566,993)	10,127
Stock indices [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		$ (55,718)	$ 546,293	$ (1,288)	$ (227,965)
[1]	Amounts recorded in the 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		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Change in unrealized trading income/(loss)		$ (9,139,197)	$ (1,454,761)	$ (8,699,130)	$ (1,713,225)
Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(28,271)	(713,117)	477,877	(1,227,357)
Agriculturals [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		3,305	(160,030)	(93,622)	65,596
Currencies [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		47,292	(538,221)	217,927	(425,578)
Energies [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		4,480	60,010	226,118	(313,242)
Interest rates [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		(81,857)	84,141	(415,894)	(30,149)
Metals [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		19,396	(235,504)	508,670	(474,681)
Stock indices [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		$ (20,887)	$ 76,487	$ 34,988	$ (49,303)
[1]	Amounts recorded in the 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 ($)	Sep. 30, 2019	Dec. 31, 2018
Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 70	$ 3,244,057
Gross Amounts offset in the Statements of Financial	(48,926)	(3,642,246)
Net Amounts Presented in the Statements of Financial Condition	25,184	(398,189)
Swap [Member]
Gross Amounts of recognized Derivative Assets	20,646,071	20,149,868
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 20,646,071	$ 20,149,868

Derivative Instruments and H_11

Derivative Instruments and Hedging Activities (Frontier Funds) (Details Textual) - Frontier Fund [Member] - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative Instruments and Hedging Activities (Frontier Funds) (Textual)
Monthly average of forwards, options and futures contracts bought	$ 138	$ 764
Monthly average of forwards, options and futures contracts sold	$ 246	$ 544
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)	9 Months Ended
	Sep. 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)	9 Months Ended
	Sep. 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]	1 Months Ended
	Nov. 13, 2019USD ($)
Frontier Balanced Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	$ 293,122
Frontier Diversified Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	115,339
Frontier Heritage Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	18,068
Frontier Long/Short Commodity Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	337,060
Frontier Masters Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	37,574
Frontier Select Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	88,977
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	$ 88,881

Subsequent Events (Frontier Fun

Subsequent Events (Frontier Funds) (Details)	1 Months Ended
	Nov. 13, 2019USD ($)
The Trust [Member] | Frontier Funds [Member] | Subsequent Event [Member]
Subsequent Events (Frontier Funds) (Textual)
Paid in redemptions	$ 979,021