There is one issue with this indicator is that it takes awhile to load. Seems to be pretty resource intensive, so I tend not do use it. It will get annoying if toggling fast between tickers due to the speed in which it loads.
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.