drawing chart from an array with more than 255 data point

Hi to everybody
I want to draw a scatter chart from an array but unfortunately it's not possible to draw more than 255 data point by this way
I use need to use this method(drawing chart from array) because drawing time is very important for me and need to update the chart about ten times per second! so it's not a good idea to transfer data to cells before drawing chart
I would be very thankful if any one suggest a better idea!

I need a horizontal line moving up and down on the main chart with a scrollbar moving up an down by user, so I used series to draw the line(different X and same Y) and update the Ys each time user moves the scrollbar to make a live movement!
I used this code:

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xdade and ydade are array variables containing 1000 datapoints but when I check the chart, there is just 255 datapoints
when I open select data interface to edit series, I got this in series y value field(exactly 255 datapoints):

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Originally Posted by shg

Please take a few minutes to read the forum rules about cross-posting.

sorry about that!
It would not happen again