ElementStacks

HTML

<script src="http://highcharts.com/js/testing.js"></script>
<div id="container" style="height: 400px"></div>

JavaScript

var data = [
    ['Jan', 4161],
    ['Feb', 870],
    ['Mar', 131],
    ['Apr', 74],
    ['May', 9],
    ['Jun', 3],
    ['Jul', 2]
];

for(i=0; i<data.length; i++)
{
    if( data[i][1] < 20 )
    { 
      data[i] = {
          name: data[i][0],
          value: data[i][1],
          y: 40
      }
    }
}
    
var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container',
        defaultSeriesType: 'pie'
    },
    plotOptions: {
        series: {
            allowPointSelect: false,
            dataLabels: {
                enabled: true
            },
            events: {
                click: function(event) {
                    alert(event.point.x);
                }
            }
        }
    },
    tooltip: {
        formatter: function(){
            
            return (typeof this.point.value === 'number') ? this.point.value : this.y ;
        }
    },
    series: [{
        data: data
    }]
});

chart.series[0].data[6].dataLabel.on('click', function(e){
    alert('clicked!')
})