If that is enough to pick the middle column, and show a zero above, then something like this would do the trick:

Of course if you have even number of columns, the zero won't be centered. That case I think the best you can do is to find where to put the zero, based on the column heights and draw it directly with Highcharts.Renderer().


You can use loop on each point, and remove stackLabel's SVG object.

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