Use this the same way how you would use the regular ATR indicator, but with the added value of knowing which side of the market has more .
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.