Has anyone seen a zigzag volume or volume by trendline indicator for TOS? Volume by trendline tools give the same effect as zigzag volume, the only difference is that the user can define the cumulative volume areas themselves by drawing trendlines on the price chart, and the volume histogram below updates accordingly. I've been looking onto how to code this myself, and am finding the task a bit daunting.

I found one here Wave Volume | ThinkScripter maybe I can just get them to mod it for trendlines....