Hi Narcis, first of all many thanks to you as your link solved the problem. Is was an issue of setting the xvalues.order property to loNone to make adding points again really fast. Silly enough: I do realtime charting with TeeChart since many years now and i know i read this document some years ago!...

Hi Folks, i run into a very strange behaviour of the pointseries.addxy method. I read time series from a textfile. To give you an idea about the speed: I read 130000 text lines containing the values for 9 different series in about 20 s. Data is added using the addxy method to the 9 series. Then i le...