For us, the school time alarms are set pretty firmly. (I think I have adjusted them 2-4x since Nov.) But the high and low alarms are set differently each night, depending on a variety of factors: 1) current bg at evening calibration (typically do + 20 off that number, if it is a good number) 2) food issues that still may play out (fat) 3) exercise or illness that may impact overnight numbers 4) whether I am testing new basal rates 5) how badly I need an uninterrupted night of sleep The CGM is an amazing tool but I think of it as one that is serving our whole family. I have no qualms about sometimes just dinging the high alarm higher so I can sleep through the night ... or other nights I'll pull him in bed with us so that I can tweak things throughout the night without having to get out of a cozy bed. It is a balancing act that comes through confidence that I am doing the best I can, most of the time. Maybe we need yet another acronym ... YAMV (your alarms may vary).