Refresh a RenderTarget

[Zapzap]

I would like to draw on the pricepanel when the user moves his mousecursor. I use a ChartControl.MouseMove event, which fires allright with the right coordinates too.

But I cannot make the OnRender override to follow it even though I use ForceRefresh() on all mouse movement. (the indicator should draw a dot where the mouse goes). I get a render call for every 20-40 mouse moves, depending on movement speed. How could I sync the two?

FYI: this is for setting a referencepoint on the chart and it needs to be within the indicator.

[Zapzap]

Hahh, after struggling for hours, I found the answer right after my post, sorry. It's:

ChartControl.InvalidateVisual();