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.
or, you can copy the script, then paste it onto your pine script editor, then save it in any name you choose, then it will be in your indicator list.
If the settings make the strategy do over 2000 orders, then the tester fails. just change settings in a way to reduce amount of orders opened, also try different timeframes.