Remember there are no holy grails. The only holy grail there is are indicators built together to stop faulty signals and be as accurate as possible and this is one of them.
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.