Highcharts => Getting the id of a point when clicking on a line chart

Question

I am building a line chart and I would like, when I click on a point of the line, to display a popup containing some data about this point. The issue I try to resolve is to

Answer 1

To return the 'ID' of the selected point on the chart use the 'X' value:

plotOptions: {
    series: {
        cursor: 'pointer',
        events: {
            click: function(event) {
                   // Log to console
                console.log(event.point);
                alert(this.name +' clicked\n'+
                      'Alt: '+ event.altKey +'\n'+
                      'Control: '+ event.ctrlKey +'\n'+
                      'Shift: '+ event.shiftKey +'\n'+
                      'Index: '+ event.point.x);
            }
        }
    }
},

See an example here: http://jsfiddle.net/engemasa/mxRwg/