| Form N-CSR Cover | 12 Months Ended |
| Jul. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | ETF Opportunities Trust |
| Entity Central Index Key | 0001771146 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Jul. 31, 2024 USD ($) Holdings | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | ETF Opportunities Trust |
| Entity Central Index Key | 0001771146 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| REX FANG & Innovation Equity Premium Income ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | REX FANG & Innovation Equity Premium Income ETF |
| Class Name | REX FANG & Innovation Equity Premium Income ETF |
| Trading Symbol | FEPI |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.rexshares.com/fepi/#reg (844) 802-4004 |
| Additional Information Phone Number | (844) 802-4004 |
| Additional Information Website | www.rexshares.com/fepi/#reg |
| 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 FANG & Innovation Equity Premium Income ETF $59¹ 0.65%² ¹ Costs are for the period of October 11, 2023 to July 31, 2024. Costs for a full annual period would be higher. ² Annualized |
| Expenses Paid, Amount | $ 59 |
| Expense Ratio, Percent | 0.65% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? For the period ended July 31, 2024 since inception, the Fund returned 25.13%. In comparison, the S&P 500® Index returned 28.18% for the same period. What key factors affected the Fund's performance? Stocks in the S&P 500® Index generally rose during the period, particularly those of companies in the technology sector, which comprise a significant portion of the index. The Fund’s equity holdings mirror the Solactive FANG Innovation Index, an index of highly liquid technology stocks. As a result, the Fund’s performance generally tracked that of the S&P 500® Index during the period but experienced more volatility related to the concentration of technology stocks in the Fund’s portfolio relative to the S&P 500® Index. The Fund’s strategy of selling covered calls caused performance to depend not only on the price returns of the individual equity holdings, but also on the paths that the prices of the individual stocks took over time. In some cases, significant upside volatility during the period led to reduced participation in equity price gains for the Fund versus both the Solactive FANG Innovation Index and the S&P 500® Index. |
| Performance Past Does Not Indicate Future [Text] | The fund's past performance is not a good predictor of how the fund will perform in the future. |
| Line Graph [Table Text Block] | Cumulative Performance (based on a hypothetical $10,000 investment) Rex Fang & Innovation Equity Premium Income ETF - $12,513 S&P 500® Index - $12,818 10/11/23 10000 10000 01/31/24 11760 11170 07/31/24 12510 12820 * Inception |
| Average Annual Return [Table Text Block] | Annual Performance Returns Since Inception ( 10/11/23 REX FANG & Innovation Equity Premium Income ETF - NAV 25.13% REX FANG & Innovation Equity Premium Income ETF - Market 25.39% S&P 500® Index 28.18% |
| Performance Inception Date | Oct. 11, 2023 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 380,370,000 |
| Holdings Count | Holdings | 50 |
| Advisory Fees Paid, Amount | $ 686,616 |
| Investment Company, Portfolio Turnover | 129.46% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of ) Fund Size (Millions) $380.37 Number of Holdings 50 Total Advisory Fee Paid $686,616 Portfolio Turnover Rate 129.46% |
| Holdings [Text Block] | Sector Breakdown Sector % COMMUNICATION SERVICES 11.61% CONSUMER DISCRETIONARY 9.62% INFORMATION TECHNOLOGY - HARDWARE 33.43% INFORMATION TECHNOLOGY - SOFTWARE & SERVICES 28.09% |
| Largest Holdings [Text Block] | Portfolio Composition COMMON STOCKS 82.75% US TREASURY BILL 1.99% OTHER ASSETS NET 15.26% OPTIONS WRITTEN -1.72% |
| Shareholder Report, Line Graph (Details) - USD ($) | Jul. 31, 2024 | Jan. 31, 2024 | Oct. 11, 2023 |
| REX FANG & Innovation Equity Premium Income ETF | |||
| Account Value [Line Items] | |||
| Account Value | $ 12,510 | $ 11,760 | $ 10,000 |
| S&P 500® Index | |||
| Account Value [Line Items] | |||
| Account Value | $ 12,820 | $ 11,170 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 10 Months Ended |
| Jul. 31, 2024 | |
| REX FANG & Innovation Equity Premium Income ETF | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 25.13% |
| S&P 500® Index | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 28.18% |
| REX FANG & Innovation Equity Premium Income ETF - Market | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 25.39% |
| Shareholder Report, Holdings (Details) - REX FANG & Innovation Equity Premium Income ETF | Jul. 31, 2024 |
| COMMUNICATION SERVICES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.61% |
| CONSUMER DISCRETIONARY | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.62% |
| INFORMATION TECHNOLOGY - HARDWARE | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 33.43% |
| INFORMATION TECHNOLOGY - SOFTWARE & SERVICES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.09% |
| COMMON STOCKS | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 82.75% |
| US TREASURY BILL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.99% |
| OTHER ASSETS NET | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.26% |
| OPTIONS WRITTEN | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.72%) |
