I'm trying to scroll the X axis everytime I add a new value to a serie, using the following code:

panellGrafic.Axis(StandardAxis.PrimaryX).View = New NRangeAxisView(New NRange1DD(panellGrafic.Axis(StandardAxis.PrimaryX).SeriesRange.End - My.Settings.range, panellGrafic.Axis(StandardAxis.PrimaryX).SeriesRange.End))

In the attached picture you can see the chart just after adding a 6.63 xvalue, and the "panellGrafic.Axis(StandardAxis.PrimaryX).SeriesRange.End" returns 6.9, and the charts draws points at 6.7,6.8 and 6.9 although the serie has not this xvalues.

How can I change this behavior and avoid points being drawn where Xvalues have no values?