v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Northern Lights Fund Trust IV
Entity Central Index Key 0001644419
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000237474  
Shareholder Report [Line Items]  
Trading Symbol BUYW
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Main BuyWrite ETF for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.mainmgtetfs.com/buyw/. You can also request this information by contacting us at 1-866-383-9778.
Additional Information Phone Number 1-866-383-9778
Additional Information Website https://www.mainmgtetfs.com/buyw/
Expenses [Text Block]

What were the Fund’s costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Main BuyWrite ETF
$45
0.89%Footnote Reference*
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.89% [1]
AssetsNet $ 1,171,077,157
Holdings Count | Holding 18
Advisory Fees Paid, Amount $ 4,278,616
InvestmentCompanyPortfolioTurnover 1.00%
Additional Fund Statistics [Text Block]

Fund Statistics 

Table Summary
Net Assets
$1,171,077,157
Number of Portfolio Holdings
18
Advisory Fee (net of waivers)
$4,278,616
Portfolio Turnover
1%
Holdings [Text Block]

Asset Weighting (% of total investments)

Group By Asset Type Chart
Table Summary
Value
Value
Exchange-Traded Funds
99.0%
Money Market Funds
1.0%

Asset Weighting (% of net assets)

Group By Sector Chart
Table Summary
Value
Value
Other Assets in Excess of Liabilities
0.2%
Index Option
-8.2%
Equity Option
-5.7%
Money Market Funds
1.1%
Fixed Income
1.2%
Equity
111.4%

Top 10 Holdings (% of net assets)

Table Summary
Holding Name
% of Net Assets
State Street SPDR Portfolio S&P 500 ETF
41.1%
iShares Core S&P 500 ETF
15.4%
State Street Energy Select Sector SPDR ETF
13.1%
Invesco Nasdaq 100 ETF
11.1%
State Street Communication Services Select Sector SPDR ETF
10.9%
State Street Financial Select Sector SPDR ETF
10.5%
State Street Health Care Select Sector SPDR ETF
9.3%
iShares 0-5 Year TIPS Bond ETF
1.2%
State Street Institutional Treasury Money Market Fund, Premier Class
1.1%
iShares Core S&P 500 ETF, 06/18/26 630.0 Call
-0.0%
[1] Annualized