Hello siva,
The custom
grid lines are parallel with one of the axis. The
custom lines represent a straight line over the chart area. You can see an
example of grid line in our demos. They do not have point marks, so in your case i suggest you to use another line series. If this does not help you, please send us a sample image so we can understand your scenario.
Kind regards,
Sia
the Telerik team
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