Setting visible: false does not work the way I want it to. Invisible series do not work with autoscaling axes. If you want a series with a tooltip but no line, you can set color: transparent .

e.g.

{
    series: [{
        name: '',
        lineColor: 'transparent',
        type: 'line',
        showInLegend: false,
        data: [[0, 100]],
        dataLabels: {
          enabled: false,
        },
        visible: true,
        color: 'transparent'
   }]
}