您可以尝试将marker.states.select设置为悬停。

plotOptions: {
    series: {
      allowPointSelect: true,
      marker: {
        states: {
          select: {
            lineColor: 'rgba(100,100,200, 0.25)',
            fillColor: null,
            lineWidth: 10,
            radius: 6,
          },
          hover: {
            lineColor: 'rgba(100,100,200, 0.25)',
            fillColor: null,
            lineWidth: 10,
            radius: 6,
          },
        }
      }
    }
  },

然后修改核心Highcharts代码并将其扩展为适当的行为。

(function(H) {
  H.wrap(H.Point.prototype.firePointEvent = function(eventType, eventArgs, defaultFunction) {
    var point = this,
      series = this.series,
      seriesOptions = series.options;
    // load event handlers on demand to save time on mouseover/out
    if (seriesOptions.point.events[eventType] ||
      (point.options &&
        point.options.events &&
        point.options.events[eventType])) {
      point.importEvents();
    }
    // add default handler if in selection mode
    if (eventType === 'click' && seriesOptions.allowPointSelect) {
      defaultFunction = function(event) {
        // Control key is for Windows, meta (= Cmd key) for Mac, Shift
        // for Opera.
        if (point.select) { // #2911
          point.select(null, true);

        }
      };
    }
    H.fireEvent(point, eventType, eventArgs, defaultFunction);
  });
}(Highcharts));

可能解决方案的概念：http://jsfiddle.net/BlackLabel/79cmw28g/2/