ATR has to be over 90 and ( lenght 52 ) has to be over 95 to find out level around which one is good to buy.
You can check back, to see that this worked very well over history. Best way to use this 2 indicators is with DCA ( dollar cost average ), as area where to buy can go a little bit down and up for as long as few months. So dont just jump in, use DCA .
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.