Well, if the datatable has the correct data in it, but the chart isn't showing it, then the problem has nothing to do with calculating information for the datatable. Instead, the problem has to do with the chart, whatever that is, and I've never used it (which should be clear, since I don't even know what it is). I would guess that you have your series set up wrong. After all, you just showed a screen shot where two different sets of data are offset by a couple rows. Since you set the series for the chart to a single value, which I assume to be a column ordinal, I don't see why it would know to pick up a different set of columns starting at a different set of rows.