Accepted answer

All you need to do is to connect the navigator range with x-axes extremes by using setExtremes method. The below example is using a navigator from Highstock.

    xAxis: {
        events: {
            afterSetExtremes: function(e) {
                chart1.xAxis[0].setExtremes(e.min, e.max, true, false);
                chart2.xAxis[0].setExtremes(e.min, e.max, true, false);

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