(To spare thread replies: I know I could round through all kinds of events to check for what would invalidate my Indi, like changing the chart scale [itself which might not be easy] -- but can't stand that type of hunt-and-peck coding ...) I was hoping for the Invalidate handler to pass more useful information for me to determine what to redraw.)
On this topic: my indi IS doing all it's drawing in the Plot method: to do this in the OnBarUpdate handler would require me adding a TON of draw objects; and that's why I went for the Plot method to begin with. So I don't want to try to manage all the dozens and more draw objects that would be created in the OnBarUpdate method. ... And I bring that up because it's possible NT has some provisions for optimizing drawing through OnBarUpdate -- because it manages Plots in many other ways -- but it's possible that nothing would actually be gained that way, and ultimately what I'm hoping for IS to implement double buffering.
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