[Solved]-How can I fix the navigator issue in highstock when I have more than 1 series in different time intervals?-Highcharts

you can use chart.addSeries()

chart.addSeries({
    name : "",
    xAxis: 0,
    yAxis: 1,
    type: "line",
    enableMouseTracking: false,
    data : your set of data to be shown in navigator,
    showInLegend:false
})

this will add a series to navigator.

a similar question is answered here

Here is a working example