How to draw multiple realtime line smoothly?

[dwang]

Hi, everyone,

I'm new here, I'm trying to draw multiple stock price at real-time. here is the code I'm using when I get realtime price point, if I only have one instrument (single series), the line is very smooth. If I have more than one, I only see separate point (the lines are broken), I guess different series data point are different (in time?), but I thought that each series should be indenpendent. Is there anything I'm doing wrong? thanks a lot.

 

private void AddPoint(DateTime datetime, double value, int seriesIdx)

{

chart1.RealTime.BeginAddData(1, RealTimeAction.Append);

chart1.Data.X[seriesIdx, 0] = datetime.ToOADate();

chart1.Data.Y[seriesIdx, 0] = value;

chart1.RealTime.EndAddData(true, true);

chart1.AxisX.LabelsFormat.Format =

AxisFormat.Time;

chart1.AxisX.LabelsFormat.CustomFormat =

"HH:mm:ss";

}