Tool tip for static plotline in y-axis

Question

I have drawn two static lines in my chart to indicate high and low range. I could keep labels for the line but I can't keep a tooltip for the the static line. Is there any way I can do this?

yAxis: {
  plotLines: [{
    value: 70,
    width: 1,
    color: '#68AF46'
    label: {
      style: {
        color: '#FE7246',
        fontWeight: 'bold'
      },
      text: '70',
      align: 'right',
      x: -10,
      y: 16
    },
  },
  {
    value: 180,
    width: 1,
    color: '#FE7246',
    label: {
      text: '180',
      align: 'right',
      style: {
        color: '#FE7246',
        fontWeight: 'bold'
      },
    },
  }]
}

I find no property to keep tooltip for plotlines.

Answer 1

You can also add two additional dummy series and hide them under the plot lines:

series: [{
    data: [1, 50, 100, 200]
}, {
    data: [70, 70, 70, 70],
    showInLegend: false,
    lineWidth: 0.5,
    color: 'transparent',
    marker: {
        radius: 0
    },
    tooltip: {
        pointFormat: 'plotLine1'
    }
}, {
    data: [180, 180, 180, 180],
    showInLegend: false,
    color: 'transparent',
    marker: {
        radius: 0
    },
    tooltip: {
        pointFormat: 'plotLine2'
    }
}]

---

Live demo: http://jsfiddle.net/BlackLabel/2Ln05yes/

API Reference: https://api.highcharts.com/highcharts/series.line.tooltip