score:1

https://jsfiddle.net/blaird/7j4a2rLo/1/

I turned the bottom marker hidden using the following CSS

#container .highcharts-markers.highcharts-tracker.highcharts-series-hover path:nth-child(2) {
  visibility:hidden
}

If you want to hide the top marker, use nth-child(1)

I did have to turn off the halo effect to make this work, since the halo is done with one path for both markers. To turn off the halo use:

    plotOptions: {
      series: {
          states: {
              hover: {
                  halo: false
              }
          }
        }
    },

If you leave the halo on, it will be the first path in the .highcharts-series-hover <g>, so you'll have to adjust your nth-child.


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