Math based on timestamp of point

[ribz]

It would be useful to be able to perform math based upon the timestamp of the datapoint (the time displayed if "time of last point" is chosen as the stat to display).

For example if I have a duration, it would be useful to add that to the current time, to get the date and time of when that duration will lapse.

[bhozar]

Being able to calculate the time difference between the latest @timestamp and now would be ideal. It would allow us to see the gap between log ingestion an highlight red/orange etc if it starts to drift too far.