Anomalous value right-click for action

[Gravityz]

i was inspecting an energy device and noticed red spikes in the last year usage graph.

it stated "Anomalous value right-click for action"
now i know what this is for and it is very handy to get rid of spikes which are faulty.

however looking at the graph the value of the spike is not that high.

Scherm­afbeelding 2026-07-28 om 13.50.30.png (134.76 KiB) Viewed 172 times

they highest value before is 11,7 and the spike flagged as anomalous is just 12,7 kWh in value.

Does anybody know what the criteria is for a value to be flagged as Anomalous?
since these values are normal i will not delete them (but then i still see the irritating red bar)

thanks