Добавьте или объявите две plotOptions в старших диаграммах для Синхронизированной диаграммы

$('#container').bind('mousemove touchmove touchstart', function (e) {
    var chart,
        point,
        i,
        event;

    for (i = 0; i < Highcharts.charts.length; i = i + 1) {
        chart = Highcharts.charts[i];
        event = chart.pointer.normalize(e.originalEvent); // Find coordinates within the chart
        point = chart.series[0].searchPoint(event, true); // Get the hovered point

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});
/**
 * Override the reset function, we don't need to hide the tooltips and crosshairs.
 */
Highcharts.Pointer.prototype.reset = function () {
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};

/**
 * Highlight a point by showing tooltip, setting hover state and draw crosshair
 */
Highcharts.Point.prototype.highlight = function (event) {
    this.onMouseOver(); // Show the hover marker
    this.series.chart.tooltip.refresh(this); // Show the tooltip
    this.series.chart.xAxis[0].drawCrosshair(event, this); // Show the crosshair
};

/**
 * Synchronize zooming through the setExtremes event handler.
 */
function syncExtremes(e) {
    var thisChart = this.chart;

    if (e.trigger !== 'syncExtremes') { // Prevent feedback loop
        Highcharts.each(Highcharts.charts, function (chart) {
            if (chart !== thisChart) {
                if (chart.xAxis[0].setExtremes) { // It is null while updating
                    chart.xAxis[0].setExtremes(e.min, e.max, undefined, false, { trigger: 'syncExtremes' });
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        });
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}

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.highcharts-point {
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.highcharts-graph.zone-1 {
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}
.highcharts-area.zone-1 {
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}
.highcharts-point.zone-1 {
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}
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}
.highcharts-area.zone-2 {
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}
.highcharts-point.zone-2 {
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<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"></div>