Performance for candlestick charts

[Szilard Perenyi]

is there anyway to increase perfomance for large candlestick charts?

[Patrick]

Hi,

Why is it slow? I would expect it to be able to handle thousand(s?) of data points before becoming too laggy. If you have many thousands of data points and are trying to "zoom out" so they are all trying to be displayed at once, then you may need to cull/resample your data. Eg, if your x-axis is time, you should plot yearly/monthly/hourly min/mean/max values as appropriate, depending on zoom level, so the plot doesn't become too cluttered.

Patrick

[Szilard Perenyi]

figured out for some reason if you call candlestickitem once with all the data it makes the plot lag alot, but if you call it multiple times and only plot 500 at once it doesnt lag the plot. 

[Bertram Gilfoyle]

Could you elaborate roughly on how you did it?