I trying to build an Analysis that will give us the Average and Max Instances Used Per Service. I have been referring to 5 Useful ArcGIS Server Analysis Elements in ArcGIS Monitor From February 2024. I keep getting stuck when configuring the serial chart element, i can't find the "Observed At" Category Field.

I hope I'm just missing something that can be fixed real easy.
Also, is it possible to do a similar query for the Max Instances Used (ArcSOCs) – Web Services element?