Variables
orderflow.buyvolume
The volume bought in the bar. A bar can carry more buy trades than sell trades while more volume goes the other way, so pick the count or the volume according to the question.
Example
indicator("Buy Volume per Bar", overlay=false)
buyVol = orderflow.buyvolume
plot(buyVol, title="Buy Volume", style=plotStyle.histogram, color=color.green)
Type
series int