Hi Lou,

I don't know what are the exactly event labels you are using in your real code. In this example, replacing

Graphics[{RandomChoice[{Green, Red}], Disk[]}, ImageSize -> 10]

with

Style["\[FilledCircle]", RandomChoice[{Red, Green}]]

will much help the load of renderer. Could you give it a try?

Also, try to set the ChartElementFunction to be "Candlestick":

ChartElementFunction -> "Candlestick"

To see if that helps.

Hi Dan, Thx for double checking. Much appreciated. I did some more tests but it's a fact that MM9 works and MM10 doesn't for this specific function(s). As a workaround I'm starting to create a kind of similar interactive trading chart based on DateListPlot. It's however alot of extra work but it does have a benefit that I can show more info then just the "indicator" lights. I thought of sending this to Wolfram Support to file it as a bug (MM9 did work :) ) but I can't imagine that this is unknown behaviour. EventLabels are very common (and practical) for the purpose of adding indicators as a visual for you chosen set of indicators. Lou