Basically, Line chart needs two points to draw a line and Bar chart needs one point to draw a bar. For example, if you select one day from the timebar and the Line chart draws only a point, this will not be in accordance with the specification of the Line chart. That is why when the SeriesDefinition is Line, the chart draws a point for the TimeBar.SelectionEnd date, even though it is not part of the selected range. Presently, it is not possible to customize this behavior. However, you can try with wiring the TimeBar.SelectionChanged
event and manually update the chart data, according to the selected range of the timebar.
I hope this information helps.
the Telerik team
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