Avg Volume = 10 day avg volume
Wide volume = AvgVolume x 1.25 (Volume bar will be Blue color)
Narrow Volume = AvgVolume x 0.65 (Volume bar will be Magenta color)
Yellow line -- 5 bar avg volume
White Line -- 10 bar avg volume
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.