Hello Scott,

You can format values on x axis by setting the TickmarkPercentage property of the X axis. You also have to set Range type and minimum and Maximum value on X axis.The following lines of code will achieve the described functionality:

this.UltraChart1.Axis.X.RangeType = Infragistics.UltraChart.Shared.Styles.AxisRangeType.Custom;
this.UltraChart1.Axis.X.RangeMax = 10000000;
this.UltraChart1.Axis.X.RangeMin = 0;
this.UltraChart1.Axis.X.TickmarkPercentage = 10;

The above lines of code will show the value on X axis as 1000000, 2000000 and so on. This value is 10 percentage of maximum value.

The following link will give you more details on TickmarkPercentage property:
<http://help.infragistics.com/NetAdvantage/ASPNET/2010.2/?page=Infragistics4.WebUI.UltraWebChart.v10.2~Infragistics.UltraChart.Resources.Appearance.AxisAppearance~TickmarkPercentage.html>

Hope this helps.

Thanks,

Bhadresh