aggregate by fixed time buckets

[yamini sharma]

I have a query to aggregate signal by 4 m time buckets.

max(max_over_time(<mymetric>[5m])) ...

However, the signal is noisy (inconsistent) over time window is always moving. Looking for a way to fix time windows by exact time to capture my signal-

e.g. fixed time buckets

05-26-2020 12:00

05-26-2020 12:04

05-26-2020 12:08

05-26-2020 12:12

..

Thanks for any input.