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 GME DAILY TARGET ETF
Class Name T-REX 2X LONG GME DAILY TARGET ETF
Trading Symbol GMEU
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 GME 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/gmeu/. 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/gmeu/
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 GME Daily Target ETF

$73

1.50%¹

¹ Annualized.
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.50% [1]
Net Assets $ 24,525,080
Holdings Count 3
Advisory Fees Paid, Amount $ 159,145
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$24,525,080

Number of Holdings

3

Total Net Advisory Fee

$159,145

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

105.11%

Money Market Fund

3.73%

Derivatives

-1.65%

Liabilities in Excess of Other Assets

-7.19%
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 HOOD DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG HOOD DAILY TARGET ETF
Class Name T-REX 2X LONG HOOD DAILY TARGET ETF
Trading Symbol ROBN
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 HOOD 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/robn/. 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/robn/
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 HOOD Daily Target ETF

$40

1.05%¹

¹ Annualized.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 1.05% [2]
Net Assets $ 126,219,680
Holdings Count 6
Advisory Fees Paid, Amount $ 667,786
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$126,219,680

Number of Holdings

6

Total Net Advisory Fee

$667,786

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%

Exchange Traded Funds:             0.00%*

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

*Less than 0.005%.

Portfolio Composition

Cash

81.50%

Derivatives

36.61%

Money Market Fund

14.16%

Exchange Traded Funds

0.00%*

Liabilities in Excess of Other Assets

-32.27%

*Less than 0.005%.
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200.00%

Exchange Traded Funds:             0.00%*

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

*Less than 0.005%.
T-REX 2X LONG DJT DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG DJT DAILY TARGET ETF
Class Name T-REX 2X LONG DJT DAILY TARGET ETF
Trading Symbol DJTU
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 DJT 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/djtu/. 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/djtu/
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 DJT Daily Target ETF

$32

1.05%¹

¹ Annualized.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 1.05% [3]
Material Change Date Jun. 18, 2026
Net Assets $ 9,396,916
Holdings Count 3
Advisory Fees Paid, Amount $ 59,627
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$9,396,916

Number of Holdings

3

Total Net Advisory Fee

$59,627

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

99.46%

Derivatives

10.40%

Money Market Fund

2.60%

Liabilities in Excess of Other Assets

-12.46%
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.
T-REX 2X LONG RBLX DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG RBLX DAILY TARGET ETF
Class Name T-REX 2X LONG RBLX DAILY TARGET ETF
Trading Symbol RBLU
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 RBLX 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/rblu/. 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/rblu/
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 RBLX Daily Target ETF

$34

1.05%¹

¹ Annualized.
Expenses Paid, Amount $ 34
Expense Ratio, Percent 1.05% [4]
Net Assets $ 13,006,035
Holdings Count 3
Advisory Fees Paid, Amount $ 50,953
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$13,006,035

Number of Holdings

3

Total Net Advisory Fee

$50,953

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

49.88%

Derivatives

35.28%

Money Market Fund

7.64%

Other Assets Net of Liabilities

7.20%
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 SNOW DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG SNOW DAILY TARGET ETF
Class Name T-REX 2X LONG SNOW DAILY TARGET ETF
Trading Symbol SNOU
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 SNOW 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/snou/. 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/snou/
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 SNOW Daily Target ETF

$74

1.50%¹

¹ Annualized.
Expenses Paid, Amount $ 74
Expense Ratio, Percent 1.50% [5]
Net Assets $ 24,982,286
Holdings Count 2
Advisory Fees Paid, Amount $ 112,016
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$24,982,286

Number of Holdings

2

Total Net Advisory Fee

$112,016

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

85.82%

Money Market Fund

9.83%

Derivatives

4.45%

Liabilities in Excess of Other Assets

-0.10%
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 APPLE DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG APPLE DAILY TARGET ETF
Class Name T-REX 2X LONG APPLE DAILY TARGET ETF
Trading Symbol AAPX
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 Apple 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/aapx/. 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/aapx/
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 Apple Daily Target ETF

$53

1.05%¹

¹ Annualized.
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.05% [6]
Net Assets $ 10,435,013
Holdings Count 2
Advisory Fees Paid, Amount $ 48,577
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$10,435,013

Number of Holdings

2

Total Net Advisory Fee

$48,577

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

83.33%

Other Assets Net of Liabilities

16.22%

Derivatives

0.45%
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 ALPHABET DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG ALPHABET DAILY TARGET ETF
Class Name T-REX 2X LONG ALPHABET DAILY TARGET ETF
Trading Symbol GOOX
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 Alphabet 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/goox/. 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/goox/
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 Alphabet Daily Target ETF

$56

1.05%¹

¹ Annualized.
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.05% [7]
Net Assets $ 52,952,711
Holdings Count 2
Advisory Fees Paid, Amount $ 290,655
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$52,952,711

Number of Holdings

2

Total Net Advisory Fee

$290,655

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

61.02%

Other Assets Net of Liabilities

28.66%

Derivatives

10.32%
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 MICROSOFT DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG MICROSOFT DAILY TARGET ETF
Class Name T-REX 2X LONG MICROSOFT DAILY TARGET ETF
Trading Symbol MSFX
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 Microsoft 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/msfx/. 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/msfx/
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 Microsoft Daily Target ETF

$40

1.05%¹

¹ Annualized.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 1.05% [8]
Net Assets $ 29,312,149
Holdings Count 2
Advisory Fees Paid, Amount $ 128,709
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026)

Fund Net Assets

$29,312,149

Number of Holdings

2

Total Net Advisory Fee

$128,709

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

107.94%

Other Assets Net of Liabilities

1.00%

Derivatives

-8.94%
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.
[1] Annualized.
[2] Annualized.
[3] Annualized.
[4] Annualized.
[5] Annualized.
[6] Annualized.
[7] Annualized.
[8] Annualized.