| Form N-CSR Cover | 12 Months Ended |
| Aug. 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 | Aug. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Aug. 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 | Aug. 31, 2024 |
| TUTTLE CAPITAL DAILY 2X INVERSE REGIONAL BANKS ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Tuttle Capital Daily 2X Inverse Regional Banks ETF |
| Class Name | Tuttle Capital Daily 2X Inverse Regional Banks ETF |
| Trading Symbol | SKRE |
| 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.shortregionalbanks.com/fund-inf (833) 759-6110 |
| Additional Information Phone Number | (833) 759-6110 |
| Additional Information Website | www.shortregionalbanks.com/fund-inf |
| Expenses [Text Block] | What were the Fund costs for the past year? (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 Tuttle Capital Daily 2X Inverse Regional Banks ETF $ 41 0.75% ¹ Costs are for the period of January 4, 2024 to August 31, 2024. Costs for a full annual period would be higher. ² Annualized |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.75% |
| Factors Affecting Performance [Text Block] | How did the fund perform? For the period January 4, 2024 to August 31, 2024, the Tuttle Capital 2x Inverse Regional Banks ETF (the ''Fund'') returned a negative 32.37% vs. the S&P 500® Index, which recorded positive 21.17%. What key factors affected the Fund’s performance? In general, regional banks financial results are often helped by lower interest rates. The Federal Reserve lowering rates and providing commentary about the path of lower interest rates going forward is a positive for regional banks, and therefore was a negative for the Fund during the period. The Fund performed as intended with an inverse return of about two times the daily return of SPDR® S&P® Regional Banking EFT (“KRE”). The Fund was almost right on target for the period, as the KRE was up almost 15% and the Fund down a little over 30%. Where the Fund’s return really deviated from the S&P 500® Index was in July when it became apparent the Federal Reserve would consider rates cuts going forward. |
| 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) Date Tuttle Capital Daily 2X Inverse Regional Banks ETF - $6,763 S&P 500® Index - $12,117 1/4/24 10000 10000 2/29/24 10835 10858 8/31/24 6763 12117 * Inception |
| Average Annual Return [Table Text Block] | Annual Performance Returns Since Inception ( 1/4/24 Tuttle Capital Daily 2X Inverse Regional Banks ETF - NAV -32.37% Tuttle Capital Daily 2X Inverse Regional Banks ETF - Market -32.08% S&P 500 Index ® 21.17% |
| Performance Inception Date | Jan. 04, 2024 |
| 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 | $ 5,241,000 |
| Holdings Count | Holdings | 0 |
| Advisory Fees Paid, Amount | $ 31,407 |
| Investment Company, Portfolio Turnover | 0% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of ) Fund Net Assets (Thousands) $5,241 Number of Holdings 0³ Total Advisory Fee Paid $31,407 Portfolio Turnover Rate 0 ³ Excludes derivatives held by the Fund |
| Holdings [Text Block] | Sector Breakdown Financials: 100.00% |
| Largest Holdings [Text Block] | Portfolio Composition Cash 176.90% Derivatives -6.00% Liabilities in Excess of Other Assets -70.90% |
| Shareholder Report, Line Graph (Details) - USD ($) | Aug. 31, 2024 | Feb. 29, 2024 | Jan. 04, 2024 |
| TUTTLE CAPITAL DAILY 2X INVERSE REGIONAL BANKS ETF | |||
| Account Value [Line Items] | |||
| Account Value | $ 6,763 | $ 10,835 | $ 10,000 |
| S&P 500® Index [Member] | |||
| Account Value [Line Items] | |||
| Account Value | $ 12,117 | $ 10,858 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 8 Months Ended |
| Aug. 31, 2024 | |
| TUTTLE CAPITAL DAILY 2X INVERSE REGIONAL BANKS ETF | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | (32.37%) |
| S&P 500® Index [Member] | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 21.17% |
| Tuttle Capital Daily 2X Inverse Regional Banks ETF - Market [Member] | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | (32.08%) |
| Shareholder Report, Holdings (Details) - TUTTLE CAPITAL DAILY 2X INVERSE REGIONAL BANKS ETF | Aug. 31, 2024 |
| Cash | |
| Holdings [Line Items] | |
| Percent of Total Investments | 176.90% |
| Derivatives [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | (6.00%) |
| Liabilities in Excess of Other Assets [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | (70.90%) |
| Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 100% |
