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.
I also tried turning this into a strategy but the results dont come back as amazing as they look on chart backtest. Should the trades be made as soon as there is a signal or do we still wait for the bar to close? If the close then not sure why the tradingview strategy backtest is so different.