Specify the Intervals on a Chart Axis

To specify the intervals between tick marks on the axis of a Chart control, set the ChartAxis.MajorTickSpacing property:

CopySetting the interval on the Y axis

<ms:Chart Title="Bar Chart" Width="600" Height="400">
  <ms:Chart.YAxis>
    <ms:ChartAxis MajorTickSpacing="5000" />
  </ms:Chart.YAxis>
</ms:Chart>

To display minor tick marks between the major tick marks, set the ChartAxis.MinorTickMarkVisibility property. If displayed, there are always 4 minor tick marks between each major tick mark.