Plot futures volumes with index
Most of the times, F&O traders like to draw their own trendlines or mark other levels on the underlying instrument where volumes of the underlying is a key parameter. When such an instrument is a non-tradeable index, then one needs to switch to the futures chart for volumes. This script plots the volumes from futures on the underlying index so that traders don't need to switch charts just for futures volumes! Hope it is useful to some. Cheers!
Notes de version:
Added selection of color for volume bars as per a comment requesting the same.