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How to draw a realtime chart

I have to write an application for Android/iOS.
I need to draw a chart with the echo data received from a fish finder via wifi. Data can be received every 50 ms and are represented in a vertical line of different colors. The first line must be drawn on the right side of the chart. Then when new data are received the previously drawn lines must be left shifted in order to leave the space to draw the new line.
I already wrote this app for Windows in C#, and I used a panel with a bitmap; but now I cannot understand which is the right approach to do the same thing for Android/iOS.
Do you have any suggestion?
I'm using Xamarin with Visual Studio 2015.
Thanks in advance for your support.
Paolo

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