Use it in conjunction with the Central Range indicator.
Below is the interpretation of the reading.
CPR Width > 0.5 - Sideways or Trading Range Day,
CPR Width > 0.75 - increases the likelihood of sideways trading behavior,
CPR Width < 0.5 - Trending type of day,
CPR Width < 0.25 - increases the likelihood of a trending market.
The above reading only increases the likely-hood of the possibility and not always right.
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.