The current implementation of the data feed charts uses the data point index instead of the date. This results in an incorrect time scale, because some days are missing and some days are duplicated. For example, in this screenshot you can see that it goes 22, 23, 25, 25, 26:

There are two data points in day 25, and their dates are:

1 day 22 hrs ago link
2 days 8 hrs ago link

They differ by 10 hours, but in the chart the points are drawn the same distance apart, as if they were 24 hours apart. The same happens in days 17 and 19.

The expected behavior would be to draw the points using the full date, so that any gaps can be clearly seen in the chart.