Highcharts Demo

author(s): Torstein Hønsi

HTML

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

<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>

JavaScript

Highcharts.setOptions({
    global: {
        useUTC: false
    }
});

var data = {a:genData(), b:genData()};

function genData() {
  // generate an array of random data
  var data = [],
     time = (new Date()).getTime(),
     i;
      
 for (i = -19; i <= 0; i += 1) {
   data.push({
     x: time + i * 1000,
     y: Math.random()
   });
 }
 return data;
}

var chart = Highcharts.chart('container', {
    chart: {
        type: 'spline',
        animation: Highcharts.svg, // don't animate in old IE
        marginRight: 10,
        events: {
            load: function () {
              setInterval(function () {
                var x = (new Date()).getTime(), // current time
                        y = Math.random(),
                        y2 = Math.random();
                        
                  chart.series[0].addPoint({x:x, y:y}, false, true);
                  chart.series[1].addPoint({x:x, y:y2}, false, true);

                  chart.redraw();
              }, 1000);
            }
        }
    },
    title: {
        text: 'Live random data'
    },
    xAxis: {
        type: 'datetime',
        tickPixelInterval: 150
    },
    yAxis: {
        title: {
            text: 'Value'
        },
        plotLines: [{
            value: 0,
            width: 1,
            color: '#808080'
        }]
    },
    tooltip: {
        formatter: function () {
            return '<b>' + this.series.name + '</b><br/>' +
                Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
                Highcharts.numberFormat(this.y, 2);
        }
    },
    legend: {
        enabled: false
    },
    exporting: {
        enabled: false
    },
    series: [{
        name: 'Random data',
        data: data.a
    }, {
        name: 'Random data 2',
        data: data.b
    }]
});