v3.25.2
Shareholder Report
 6 Months Ended
Jun. 30, 2025
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, 2025
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 April 24, 2025 (inception) to June 30, 2025.
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 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

T-Rex 2X Long GME Daily Target ETF

$231

1.50%²

¹ Costs are for the period of April 24, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.

² Annualized.
Expenses Paid, Amount $ 23 [1]
Expense Ratio, Percent 1.50% [2]
Expenses Short Period Footnote [Text Block] Costs are for the period of April 24, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
Net Assets $ 39,750,071
Holdings Count 3
Advisory Fees Paid, Amount $ 41,946
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$39,750,071

Number of Holdings

3

Total Advisory Fee

$41,946

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 197.03%
Money Market Fund:                   2.97%

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

Portfolio Composition

Cash

92.96%

Derivatives

3.61%

Money Market Fund

2.97%

Other Assets Net of Liabilities

0.46%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 197.03%
Money Market Fund:                   2.97%

“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 31, 2025 (inception) to June 30, 2025.
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 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

T-Rex 2X Long HOOD Daily Target ETF

$671

1.05%²

¹ Costs are for the period of January 31, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.

² Annualized.
Expenses Paid, Amount $ 67 [3]
Expense Ratio, Percent 1.05% [4]
Expenses Short Period Footnote [Text Block] Costs are for the period of January 31, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
Net Assets $ 180,857,210
Holdings Count 4
Advisory Fees Paid, Amount $ 280,058
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$180,857,210

Number of Holdings

4

Total Advisory Fee

$280,058

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 186.63%
Money Market Fund:                 13.37%

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

Portfolio Composition

Other Assets Net of Liabilities

33.94%

Cash

27.78%

Derivatives

24.91%

Money Market Fund

13.37%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 186.63%
Money Market Fund:                 13.37%

“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 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 March 4, 2025 (inception) to June 30, 2025.
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.
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 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

T-Rex 2X Long DJT Daily Target ETF

$251

1.05%²

¹ Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.

² Annualized.
Expenses Paid, Amount $ 25 [5]
Expense Ratio, Percent 1.05% [6]
Extraordinary Expenses Footnote [Text Block] Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
Net Assets $ 9,367,080
Holdings Count 2
Advisory Fees Paid, Amount $ 9,574
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$9,367,080

Number of Holdings

2

Total Advisory Fee

$9,574

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 193.65%
Money Market Fund:                   6.35%

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

Portfolio Composition

Cash

77.64%

Other Assets Net of Liabilities

14.07%

Money Market Fund

6.35%

Derivatives

1.94%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 193.65%
Money Market Fund:                   6.35%

“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 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 March 4, 2025 (inception) to June 30, 2025.
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 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

T-Rex 2X Long RBLX Daily Target ETF

$611

1.05%²

¹ Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.

² Annualized.
Expenses Paid, Amount $ 61 [7]
Expense Ratio, Percent 1.05% [8]
Expenses Short Period Footnote [Text Block] Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
Net Assets $ 4,474,435
Holdings Count 2
Advisory Fees Paid, Amount $ 4,467
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$4,474,435

Number of Holdings

2

Total Advisory Fee

$4,467

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 190.49%
Money Market Fund:                   9.51%

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

Portfolio Composition

Cash

50.74%

Derivatives

39.79%

Money Market Fund

9.51%

Other Assets Net of Liabilities

-0.04%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 190.49%
Money Market Fund:                   9.51%

“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 ARM DAILY TARGET ETF [Member]  
Shareholder Report [Line Items]  
Fund Name T-REX 2X LONG ARM DAILY TARGET ETF
Class Name T-REX 2X LONG ARM DAILY TARGET ETF
Trading Symbol ARMU
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 ARM Daily Target ETF for the period of March 4, 2025 (inception) to June 30, 2025.
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/armu/. 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/armu/
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

T-Rex 2X Long ARM Daily Target ETF

$421

1.05%²

¹ Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.

² Annualized.
Expenses Paid, Amount $ 42 [9]
Expense Ratio, Percent 1.05% [10]
Expenses Short Period Footnote [Text Block] Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
Net Assets $ 1,848,861
Holdings Count 2
Advisory Fees Paid, Amount $ 3,371
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$1,848,861

Number of Holdings

2

Total Advisory Fee

$3,371

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 190.48%
Money Market Fund:                   9.52%

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

Portfolio Composition

Derivatives

59.12%

Cash

31.53%

Money Market Fund

9.52%

Other Assets Net of Liabilities

-0.17%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 190.48%
Money Market Fund:                   9.52%

“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 April 24, 2025 (inception) to June 30, 2025.
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 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

T-Rex 2X Long SNOW Daily Target ETF

$451

1.50%²

¹ Costs are for the period of April 24, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.

² Annualized.
Expenses Paid, Amount $ 45 [11]
Expense Ratio, Percent 1.50% [12]
Expenses Short Period Footnote [Text Block] Costs are for the period of April 24, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
Net Assets $ 3,289,050
Holdings Count 2
Advisory Fees Paid, Amount $ 5,381
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$3,289,050

Number of Holdings

2

Total Advisory Fee

$5,381

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 192.16%
Money Market Fund:                   7.84%

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

Portfolio Composition

Cash

57.07%

Other Assets Net of Liabilities

36.16%

Money Market Fund

7.84%

Derivatives

-1.07%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 192.16%
Money Market Fund:                   7.84%

“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, 2025 to June 30, 2025.
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 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

T-Rex 2X Long Apple Daily Target ETF

$41

1.05%1

¹ Annualized.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 1.05% [13]
Net Assets $ 12,891,017
Holdings Count 2
Advisory Fees Paid, Amount $ 36,531
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$12,891,017

Number of Holdings

2

Total Advisory Fee

$36,531

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 200%

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

Portfolio Composition

Cash

98.38%

Derivatives

2.52%

Other Assets Net of Liabilities

-0.90%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200%

“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, 2025 to June 30, 2025.
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 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

T-Rex 2X Long Alphabet Daily Target ETF

$46

1.05%1

¹ Annualized.
Expenses Paid, Amount $ 46
Expense Ratio, Percent 1.05% [14]
Net Assets $ 19,842,327
Holdings Count 2
Advisory Fees Paid, Amount $ 66,008
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$19,842,327

Number of Holdings

2

Total Advisory Fee

$66,008

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 200%

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

Portfolio Composition

Cash

89.32%

Other Assets Net of Liabilities

5.83%

Derivatives

4.85%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200%

“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, 2025 to June 30, 2025.
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 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

T-Rex 2X Long Microsoft Daily Target ETF

$59

1.05%1

¹ Annualized.
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.05% [15]
Net Assets $ 8,990,983
Holdings Count 2
Advisory Fees Paid, Amount $ 125,885
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2025)

Fund Net Assets

$8,990,983

Number of Holdings

2

Total Advisory Fee

$125,885

Annual Portfolio Turnover

0.00%
Holdings [Text Block]

What did the Fund invest in?

(% of Net Assets as of June 30, 2025)

Market Exposure

Total Return Swap Contracts: 200%

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

Portfolio Composition

Cash

77.24%

Other Assets Net of Liabilities

19.25%

Derivatives

3.51%
Exposure Basis Explanation [Text Block]

Market Exposure

Total Return Swap Contracts: 200%

“Market Exposure” includes the values of total investments (including the contract value of any derivatives) and excludes any short-term investments.
[1] Costs are for the period of April 24, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
[2] Annualized.
[3] Costs are for the period of January 31, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
[4] Annualized.
[5] Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
[6] Annualized.
[7] Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
[8] Annualized.
[9] Costs are for the period of March 4, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
[10] Annualized.
[11] Costs are for the period of April 24, 2025 to June 30, 2025. Costs for a full semi-annual period would be higher.
[12] Annualized.
[13] Annualized.
[14] Annualized.
[15] Annualized.