1. Calculate market return of each asset - formula => (final value - initial value)/initial value
2. Calculate the aggregate average market return of chosen assets
The purpose of this script to see how much you would gain if you buy and hold the asset for a specific period.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.