In stacked column chart, when min and max value have huge difference, index labels getting overlapped with each other. So this is happening because, the dataPoints with value say 111338 will set the range for the axisY. Then the dataPoint with value say 2 will not be displayed on the chart because of the range set by the first dataPoints is so high that the value 2 will just half pixel or so. Hence the indexlabel for the 2nd and 3rd dataSeries overlap. How I can add space or set min height to index label so they will not overlap with each other.
https://jsfiddle.net/canvasjs/9hfy34zp/
Even in this fiddle if you change min max, you will be able to see issue
y: 111338
y: 2