Highcharts Demo

author(s): Torstein Hønsi

by Black Label

HTML

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>

<div id="container" style="height: 400px"></div>

JavaScript

var redrawEnabled = true;

var chart = Highcharts.chart('container', {
    chart: {
        zoomType: 'x',
        events: {
            redraw: function() {
                if (redrawEnabled) {
                    var sum = 0;
                    redrawEnabled = false;

                    Highcharts.each(this.series[0].points, function(point) {
                        if (point.isInside) {
                            sum += point.y;
                        }
                    });

                    this.update({
                        subtitle: {
                            text: sum
                        }
                    });

                    redrawEnabled = true;
                }
            }
        }
    },
    series: [{
        data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
    }]
});