| Form N-CSR Cover | 6 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | ETF Opportunities Trust |
| Entity Central Index Key | 0001771146 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Shareholder Report | 6 Months Ended | |
| Nov. 30, 2024 USD ($) Holdings | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSRS | |
| Amendment Flag | false | |
| Registrant Name | ETF Opportunities Trust | |
| Entity Central Index Key | 0001771146 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Nov. 30, 2024 | |
| REX AI Equity Premium Income ETF | ||
| Shareholder Report [Line Items] | ||
| Fund Name | REX AI Equity Premium Income ETF | |
| Class Name | REX AI Equity Premium Income ETF | |
| Trading Symbol | AIPI | |
| Security Exchange Name | NASDAQ | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.rexshares.com/aipi/ (844) 802-4004 | |
| Additional Information Phone Number | (844) 802-4004 | |
| Additional Information Website | www.rexshares.com/aipi/ | |
| Expenses [Text Block] | What were the Fund costs for the period? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment REX AI Equity Premium Income ETF $35¹ 0.65%² ¹ Costs are for the period of June 3, 2024 to November 30, 2024. Costs for a full semi-annual period would be higher. ² Annualized. | |
| Expenses Paid, Amount | $ 35 | [1] |
| Expense Ratio, Percent | 0.65% | [2] |
| Expenses Short Period Footnote [Text Block] | Costs are for the period of June 3, 2024 to November 30, 2024. Costs for a full semi-annual period would be higher. | |
| Net Assets | $ 141,621,000 | |
| Holdings Count | Holdings | 129 | |
| Advisory Fees Paid, Amount | $ 148,315 | |
| Investment Company, Portfolio Turnover | 46.21% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024 ) Net Assets (Thousands) $141,621 Number of Holdings 129 Total Advisory Fee Paid $148,315 Portfolio Turnover Rate 46.21% | |
| Holdings [Text Block] | What did the Fund invest in? (% of Net Assets as of November 30, 2024 ) Sector Breakdown Sector % Applications Software 0.0583 Communication Services 0.0544 Computer Aided Design 0.058899999999999994 Computer Data Security 0.0969 Computer Services 0.0297 Computer Software 0.032400000000000005 Computers 0.029 Computers - Integrated Systems 0.0341 Consumer Discretionary 0.0286 Electronic Components - Semiconductors 0.2717 Electronic Forms 0.0291 Enterprise Software/Services 0.16829999999999998 Internet Security 0.0291 Networking Products 0.0571 Semicon Components - Integrated Circuitry 0.0261 US Treasury Bill 0.0281 | |
| Largest Holdings [Text Block] | Top Ten Holdings Palantir Technologies Inc. 13.78% CrowdStrike Holdings, Inc. 9.69% Nvidia Corp. 9.27% Arm Holdings plc 7.15% Super Micro Computer, Inc. 3.41% Datadog, Inc. Class A 3.23% Salesforce, Inc. 3.05% ServiceNow, Inc. 3.02% International Business Machines Corp. 2.97% Cadence Design Systems 2.96% | |
| [1] Costs are for the period of June 3, 2024 to November 30, 2024. Costs for a full semi-annual period would be higher. | ||
| Shareholder Report, Holdings (Details) - REX AI Equity Premium Income ETF | Nov. 30, 2024 |
| Palantir Technologies Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.78% |
| CrowdStrike Holdings, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.69% |
| Nvidia Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.27% |
| Arm Holdings plc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.15% |
| Super Micro Computer, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.41% |
| Datadog, Inc. Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.23% |
| Salesforce, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.05% |
| ServiceNow, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.02% |
| International Business Machines Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.97% |
| Cadence Design Systems [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.96% |
| Applications Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.83% |
| Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.44% |
| Computer Aided Design [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.89% |
| Computer Data Security [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.69% |
| Computer Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.97% |
| Computer Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.24% |
| Computers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Computers - Integrated Systems [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.41% |
| Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.86% |
| Electronic Components - Semiconductors [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.17% |
| Electronic Forms [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.91% |
| Enterprise Software/Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.83% |
| Internet Security [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.91% |
| Networking Products [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.71% |
| Semicon Components - Integrated Circuitry [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.61% |
| US Treasury Bill [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.81% |
