Unless we look into your code, we can’t predict what went wrong in it. Can you kindly create a sample project and share your code, so that we can look into it and help you out.
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Vishwas R
We are unable to see pan/reset button being shown on clicking ‘scale’ button.
Please check this.

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Vishwas R
Sorting data before calling chart.render method in updateECG() will work fine in your case. Kindly refer this page for tutorial on array-sorting in JavaScript.
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Vishwas R
Kindly download and check ASP.net samples from this link. Refer this section for tutorials on integrating CanvasJS charts to ASP.net MVC application.
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Vishwas R
Kiran,
This feature is not available as of now. But by splitting it into multi-series, you can achieve the same. Please Please check this jsfiddle.
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Vishwas R
We checked the click event. In browser it seems to be working fine but not in webview.
Please refer the following links for more info:
http://stackoverflow.com/questions/24085159/webview-not-catching-javascript-touch-events
http://stackoverflow.com/questions/14846071/touch-events-in-android-webview
http://stackoverflow.com/questions/5271898/javascript-alert-not-working-in-android-webview
http://android-er.blogspot.in/2014/05/android-webview-detect-touch-events.html
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Vishwas R
Rajendra,
Instead of shifting dps once its length becomes 500, you can just keep shifting y-value keeping x-values constant from 1-500. In this case, x-vlaues remains same and the stripLines stay at same values, just y-values keeps updating/shifting.
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Vishwas R
It seems data received from database is not parsed properly (not in order/sorted according to x-value) before adding it to chart. Kindly check the data you receive from database.
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Vishwas R
Can you kindly create jsfiddle with the issue, so that we can look into it and help you out.
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Vishwas R
Ronald,
It seems like when you run your app in emulator, canvasjs.min.js file is loaded from local/server which makes chart to render without any issue. But in app-store, canvajs.min.js may not be loaded (May the file-path is not proper) which is needed to render the chart. Can you kindly verify this once?
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Vishwas R
Can you kindly create JSFiddle reproducing the issue you are facing & share it with us, so that we can look into the code, understand the scenario better and help you out?
Please refer to this documentation page for step-to-step tutorial on creating dynamic charts. Also checkout this forum topic related to ECG graph using CanvasJS chart.

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Vishwas R