Interval Markers on both side of axis in Highcharts

If you want to have interval markers on both side of axis in Highcharts and wondering how to do it because Highcharts only support tickPosition = inside or outside. Here is a simple work-around for it.
We can do it in three simple steps.

  1. Add one more xAxis, with tickPosition as ‘inside’
  2. Disable its labels (so that there will be no gap between both the axes
  3. link the second axis with first one using linkedTo
 xAxis: [{
    tickPosition: 'inside',
    tickWidth: 2,
    labels: {
       enabled: false
    tickInterval: 1.666
    tickInterval: 5,
    tickWidth: 2,
    linkedTo: 0

JS fiddle: