x-axis labels missing on zoom

[bzed]

It is possible to zoom into a graph until there is no label on the x axis anymore. If the proper times are not known they should be interpolated from known times or re-fetched from the server.

[auxesis]

Refetching the data from the server won't do anything, given the frequency of the axis labels are specified with a tick value (IIRC). The exact time is known for every data point, as its automatically calculated based of the start/finish times of the data series.

It may be possible to increase the frequency of the x labels on zoom. I'll check the highcharts docs.

In the mean time though, it should be possible to determine the exact time by hovering the mouse over one of the data points on the chart.