I think the only option you have right now is to write a system that does this. It would have to create a rectangle chart object on the chart for each of the "volume bars" you wanted to draw. Your horizontal coordinate resolution will be limited to one bar.
I was afraid of that. I'll have to draw over a hundred chart objects which will slow my processing. Which do you think is a betrter idea:
a) draw hundred objects or
b) spawn a form on a separate thread and draw a vertical bar chart updated bar by bar?
"better is the enemy of good enough"