Hi, I have a series of metrics that provide expiration epoch timestamps (for SSL certificates) in Graphite. I can graph them in Grafana as “From Now” which is excellent! 
What I’d like to do, is set an alert on the “time remaining” being less than some number of days. eg something like:
(foo.certificate.* - NOW()) < 30days
Is it possible to either get the Graphite query to convert epoch timestamps to “time remaining” (or an offset to/from “now”), or alternatively is there some way to set the alert criteria to do the same?
Thanks!