score:1

Accepted answer

disable stickytracking and enable trackbyarea options:

    plotoptions: {
        series: {
            ...,
            stickytracking: false,
            trackbyarea: true
        }
    }

live demo: http://jsfiddle.net/blacklabel/7ens45ot/

api reference:

https://api.highcharts.com/highcharts/series.area.stickytracking

https://api.highcharts.com/highcharts/series.area.trackbyarea


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