score:1

Accepted answer

you should change $('#container').highcharts('stockchart', { with window.chart = new highcharts.stockchart({ so that you have the chart object, then add:

window.chart.addseries({
        name : "",
        xaxis: 0,
        yaxis: 3,
        type: "line",
        enablemousetracking: false,
        data :[your data],
        showinlegend:false
    });

yaxis 3 is the yaxis of the navigator. you can add as many series as you want - demo


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