I understand the basis your idea, but how are you calculating your CF from your BG reading every time? Maybe I am missing something.
I do something that might be similar. Not sure if this is the same thing you are talking about.
I know that my CGM is always behind my BG number. So if my CGM is 30 points higher than my BG number, I know I am dropping more rapidly than if my CGM is only 10 points higher.
Is that at all the same thing you are referring to?
How do you get a CF from your CGM reading?