Thank you for writing.
the vertical axis should not flicker, however, I am not sure of your implementation of the live data chart and what actually is causing the problem.
That is why I am sending you a sample project demonstrating an approach which I think is suitable also for your scenario.
Considering your other request, I think that for the purpose you could use a second chart in which you could display additional information. We also have an example (ChartView > LiveData) in our demo application covering this type of scenario, the source code of the examples is located in the installation folder of the suite: C:\Program Files (x86)\Telerik\UI for WinForms Q2 2015\Examples.
I am also sending you a gif file showing the result of my sample app.
I hope this helps. Should you have further questions please do not hesitate to write back.
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