Sufficiently large data sets cause x-axis labels to all have the same value

[portante]

With sufficiently large data sets, JSChart will use x-axis labels that are all identical, typically 00:00. When you zoom in the x-axis labels start to resolve to different values.

[webbnh]

The x-axis labels appear to be coded with a fixed MM-SS format. The format should presumably be dynamic, based on the amount of time represented by the whole axis (e.g., if the whole axis is between 1 and 24 hours, then the labels should show hours and minutes (and probably omit seconds); if the whole axis is between 1 minute and 1 hour, then the labels should show minutes (and probably hours but not seconds); if the axis is between 1 second and 1 minute, then the labels should show seconds (and probably minutes, but not fractional seconds); if the axis represents less than a second, then it should show fractional seconds. (And, hopefully, we don't need to deal with intervals greater than 24 hours, but, if we do, then it should show days and hours.)

[ndokos]

The format should also include an indication of what the units are: does "01:00" mean one minute and zero seconds or one hour and zero minutes?