score:1

Found the reason: the values are just too small to be displayed. Unfortunately, a mouse over won't show at least those values.

Setting the clip option to false solve partially the problem.

      this.columnChartOptions.plotOptions = {
        column: {
          stacking: 'normal',
          clip: false
        }
      };

score:0

As you rightly noticed - the values are just too small to be displayed. A good solution can be to set minPointLength and use null data vales insted of 0. For example:

  series: [{
    type: 'column',
    minPointLength: 5,
    stacking: 'normal',
    data: [...]
  }]

Live demo: http://jsfiddle.net/BlackLabel/Ly1fkzdh/

API Reference: https://api.highcharts.com/highcharts/series.column.minPointLength


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