Hi Narcís, thanks so far but the code you send dosn't work for me because i am getting the datatable from a database. The code i wrote was just to show the problem i have. Because of loading values from database, it is not possible to set the NULL-values where i want. I testet the code anyway and he...

Hi Narcís,

i' have posted the sample application in your newsgroup.

Thank you,

Marco

Hi, I have several FastLines in a Chart, which data sources are datatables filled from a Database. All of them are Timeseries with TreatNullsStyle = DoNotPaint and the X-Values order is set to Ascending. When the User scrolls the Chart, I only fetch the yet not shown values into a new datatable and ...