Chart Net Change

[ddurra]

I am trying to figure out how I could chart the net change of a contract. I am looking specifically at futures contracts, and trying to find a way to look at a daily chart and trying to figure out how to graphically display net change, not price. For example, if corn was up 5 cents 3 days ago, then down 12 cents, then up 3 cents from there, I would like to plot +5, -12, +3.

[ddurra]

figured it out

I figured it out in case anyone is interested

return close(0)-close(-1)