If you have not yet integrated RadChart into your application we suggest you switch to the new RadChartView
control which has a greater performance than the old RadChart, it is generally more flexible and easy to set up.
In both cases - RadChart and RadChartView, you can use a slider outside the charts to control the zooming, but I did not fully understand what is "corresponding/intersecting Y values" so I will ask that you provide us with some snapshots and drawings of the desired results and a little more explanations so that we know what needs to be achieved.
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