Q:

Highcharts series rendering problems

I'm working with Highcharts and Highstock and my chart is working weird; it shows vertical lines between markers.

As you can see, Vertical lines appears and they shouldn't. 

A:

Your data is filled with duplicate x values, as in this snippet taken from the last few elements of your data array:
    [Date.UTC(2015, 0, 31, 6, 38, 0), 1.32905],
    [Date.UTC(2015, 0, 31, 6, 38, 0), 1.30528],
    [Date.UTC(2015, 0, 31, 10, 8, 0), 1.49073],
    [Date.UTC(2015, 0, 31, 10, 8, 0), 1.46641],
    [Date.UTC(2015, 0, 31, 12, 5, 0), 1.33667],
    [Date.UTC(2015, 0, 31, 12, 5, 0), 1.33403],
    [Date.UTC(2015, 0, 31, 14, 5, 0), 1.39598],
    [Date.UTC(2015, 0, 31, 14, 5, 0), 1.50467],
    [Date.UTC(2015, 0, 31, 15, 40, 0), 1.29815],
    [Date.UTC(2015, 0, 31, 15, 40, 0), 1.27599],

Remove duplicate x values from your data if you do not want them to be plotted in this manner.

