It is set to overlay the candles so looks different from normal ATR but i assure you it is ATR
Script open so you can see for yourself.
perhaps different settings are better,
Help me test it, and suggest improvements thankyou
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.