@rajeshpdsij-in,
You can set selectedRangeButtonIndex property to e.index value in rangeChanged event handler to highlight the button selected after manipulating with data. Please take a below code snippet for the same.
stockChart.rangeSelector.set("selectedRangeButtonIndex", e.index)
Also, checkout this updated JSFiddle for complete working code.
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Manoj Mohan
Team CanvasJS