@vishnumohan89,

To design a line chart that always starts from y-axis line you can set the minimum of axisX to the x-value of the first dataPoint. Please check the below code snippet –

function setAxisXMinimum(){
   chart.axisX[0].set("minimum", chart.options.data[0].dataPoints[0].x);
}

Also, kindly take a look at this JSFiddle for complete working code.

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Indranil Deo
Team CanvasJS