v3.26.1
Shareholder Report
6 Months Ended
Jun. 30, 2026
USD ($)
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 Jun. 30, 2026
T-REX 2X LONG GME DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X Long CRWV Daily Target ETF
Class Name T-REX 2X Long CRWV Daily Target ETF
Trading Symbol CRWU
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the T-REX 2X Long CRWV Daily Target ETF for the period of January 1, 2026 to June 30, 2026.
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/crwu/. You can also request this information by contacting us at (833) 759-6110.
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (833) 759-6110
Additional Information Website www.rexshares.com/crwu/
Expenses [Text Block]

What were the Fund costs for the past six months?

(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

T-REX 2X Long CRWV Daily Target Etf

$82

1.50%¹

¹ Annualized.

Expenses Paid, Amount $ 82
Expense Ratio, Percent 1.50% [1]
Material Change Date Jul. 31, 2026
Net Assets $ 36,666,304
Holdings Count 2
Advisory Fees Paid, Amount $ 192,913
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$36,666,304

Number of Holdings

2

Total Net Advisory Fee

$192,913

Portfolio Turnover Rate

0.00%

Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2026)

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure" includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Portfolio Composition

Cash

92.24%

Derivatives

24.65%

Money Market Fund

1.91%

Liabilities in Excess of Other Assets

-18.80%

Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure" includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Material Fund Change [Text Block]

Material Changes

Stock Split

On July 31, 2026, the Board of Trustees approved a 1-for-10 reverse stock split for the Fund. The reverse stock split was effectuated after the close of trading on August 21, 2026, and shares of the Fund began trading on a split-adjusted basis on August 24, 2026. The Creation Unit size remained at 10,000 shares per unit.

T-REX 2X INVERSE CRWV DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X INVERSE CRWV DAILY TARGET ETF
Class Name T-REX 2X INVERSE CRWV DAILY TARGET ETF
Trading Symbol CORD
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the T-REX 2X Inverse CRWV Daily Target ETF for the period of January 1, 2026 to June 30, 2026.
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/cord/. You can also request this information by contacting us at (833) 759-6110.
Additional Information Phone Number (833) 759-6110
Additional Information Website www.rexshares.com/cord/
Expenses [Text Block]

What were the Fund costs for the past six months?

(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

T-REX 2X Inverse CRWV Daily Target ETF

$42

1.50%¹

¹ Annualized.

Expenses Paid, Amount $ 42
Expense Ratio, Percent 1.50% [2]
Net Assets $ 16,873,145
Holdings Count 4
Advisory Fees Paid, Amount $ 126,253
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$16,873,145

Number of Holdings

4

Total Net Advisory Fee

$126,253

Portfolio Turnover Rate

0.00%

Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2026)

Market Exposure

Total Return Swap Contracts: -200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Portfolio Composition

Cash

106.93%

Money Market Fund

4.87%

Liabilities in Excess of Other Assets

-4.39%

Derivatives

-7.41%

Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: -200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

T-REX 2X LONG CRCL DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X Long CRCL Daily Target ETF
Class Name T-REX 2X Long CRCL Daily Target ETF
Trading Symbol CCUP
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the T-REX 2X Long CRCL Daily Target ETF for the period of January 1, 2026 to June 30, 2026.
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/ccup/. You can also request this information by contacting us at (833) 759-6110.
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (833) 759-6110
Additional Information Website www.rexshares.com/ccup/
Expenses [Text Block]

What were the Fund costs for the past six months?

(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

T-REX 2X Long CRCL Daily Target ETF

$50

1.50%1

¹ Annualized.

Expenses Paid, Amount $ 50
Expense Ratio, Percent 1.50% [3]
Material Change Date Jul. 31, 2026
Net Assets $ 32,429,123
Holdings Count 2
Advisory Fees Paid, Amount $ 228,618
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$32,429,123

Number of Holdings

2

Total Net Advisory Fee

$228,618

Portfolio Turnover Rate

0.00%

Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2026)

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Portfolio Composition

Cash

111.17%

Other Assets Net of Liabilities

21.51%

Money Market Fund

2.40%

Derivatives

-35.08%

Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Material Fund Change [Text Block]

Material Changes

Stock Split

On July 31, 2026, the Board of Trustees approved a 1-for-10 reverse stock split for the Fund. The reverse stock split was effectuated after the close of trading on August 21, 2026, and shares of the Fund began trading on a split-adjusted basis on August 24, 2026. The Creation Unit size remained at 10,000 shares per unit.

T-REX 2X INVERSE CRCL DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X Inverse CRCL DAILY TARGET ETF
Class Name T-REX 2X Inverse CRCL DAILY TARGET ETF
Trading Symbol CRCD
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the T-REX 2X Inverse CRCL Daily Target ETF for the period of January 1, 2026 to June 30, 2026.
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/crcd/. You can also request this information by contacting us at (833) 759-6110.
Additional Information Phone Number (833) 759-6110
Additional Information Website www.rexshares.com/crcd/
Expenses [Text Block]

What were the Fund costs for the past six months?

(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

T-REX 2X Inverse CRCL Daily Target ETF

$45

1.50%1

¹ Annualized.

Expenses Paid, Amount $ 45
Expense Ratio, Percent 1.50% [4]
Net Assets $ 8,897,936
Holdings Count 3
Advisory Fees Paid, Amount $ 77,299
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$8,897,936

Number of Holdings

3

Total Net Advisory Fee

$77,299

Portfolio Turnover Rate

0.00%

Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2026)

Market Exposure

Total Return Swap Contracts: -200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Portfolio Composition

Cash

66.77%

Derivatives

33.00%

Money Market Fund

2.80%

Liabilities in Excess of Other Assets

-2.57%

Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: -200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

T-REX 2X Long SMR Daily Target ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG SMR DAILY TARGET ETF
Class Name T-REX 2X LONG SMR DAILY TARGET ETF
Trading Symbol SMUP
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the T-REX 2X Long SMR Daily Target ETF for the period of January 1, 2026 to June 30, 2026.
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/smup/. You can also request this information by contacting us at (833) 759-6110.
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (833) 759-6110
Additional Information Website www.rexshares.com/smup/
Expenses [Text Block]

What were the Fund costs for the past six months?

(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

T-REX 2X Long SMR Daily Target ETF

$51

1.59%1,2

¹ Annualized.

2  Ratio of expenses, excluding excise tax expense, would have been 1.50%
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.59% [5],[6]
Material Change Date Mar. 23, 2026
Net Assets $ 13,441,934
Holdings Count 2
Advisory Fees Paid, Amount $ 97,458
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$13,441,934

Number of Holdings

2

Total Net Advisory Fee

$97,458

Portfolio Turnover Rate

0.00%

Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2026)

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Portfolio Composition

Cash

121.78%

Money Market Fund

2.22%

Derivatives

-4.21%

Liabilities in Excess of Other Assets

-19.79%

Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Material Fund Change [Text Block]

Material Changes

Stock Split

On March 23, 2026, the Board of Trustees approved a 1-for-25 reverse stock split for the Fund. The reverse stock split was effectuated after the close of trading on April 7, 2026, and shares of the Fund began trading on a split-adjusted basis on April 8, 2026. The Creation Unit size remained at 5,000 shares per unit.

T-REX 2X LONG BMNR DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X Long BMNR Daily Target ETF
Class Name T-REX 2X Long BMNR Daily Target ETF
Trading Symbol BMNU
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the T-REX 2X Long BMNR Daily Target ETF for the period of January 1, 2026 to June 30, 2026.
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/bmnu/. You can also request this information by contacting us at (833) 759-6110.
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (833) 759-6110
Additional Information Website www.rexshares.com/bmnu/
Expenses [Text Block]

What were the Fund costs for the past six months?

(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

T-REX 2X Long BMNR Daily Target ETF

$42

1.50%¹

¹ Annualized.

Expenses Paid, Amount $ 42
Expense Ratio, Percent 1.50% [7]
Material Change Date Jun. 18, 2026
Net Assets $ 165,444,514
Holdings Count 6
Advisory Fees Paid, Amount $ 2,400,741
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$165,444,514

Number of Holdings

6

Total Net Advisory Fee

$2,400,741

Portfolio Turnover Rate

0.00%

Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2026)

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure" includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Portfolio Composition

Cash

100.82%

Money Market Fund

5.19%

Other Assets Net of Liabilities

1.48%

Derivatives

-7.49%

Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200.00%

“Market Exposure" includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.

Material Fund Change [Text Block]

Material Changes

Stock Split

On June 18, 2026, the Board of Trustees approved a 1-for-10 reverse stock split for the Fund. The reverse stock split was effectuated after the close of trading on July 10, 2026, and shares of the Fund began trading on a split-adjusted basis on July 13, 2026. The Creation Unit size remained at 10,000 shares per unit.

[1] Annualized.
[2] Annualized.
[3] Annualized.
[4] Annualized.
[5] Ratio of expenses, excluding excise tax expense, would have been 1.50%.
[6] Annualized.
[7] Annualized.