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In fact the meaning of the domain axis in a P&F chart just means 'there was a change in market behavior here'. I'd just use a numerical axis for both range and domain since the domain has no fixed relation to passage of time. Traditionally P&F charts I've seen don't even label the domain axis. The R...

I think you are going to have to do the math yourself to come up with a single series of data which is what you want. The charting code is really intended to chart data, not process it. So every value in the series is going to be plotted individually. My solution to the somewhat similar situation is...

This is just a Frankensteining of the relevant parts of TooltipChartPanel into the ChartComposite to create, wallah!, TooltipChartComposite. I got FastXYPlot working, and that definitely helped rendering speed (20k point Candlestick, still pretty slow, but now down to under 10 seconds on my E6600 1....