M value guidelines

[Javanewt]

I know what M is, but I can't find a thread that helps with when to push, when to wait, etc. (For example, push with TT+ with an M of 5 or less (invented this).)

I've tried a 2+2 search and an Internet search. If a thread exists, please point me to it. Sorry if this is in the wrong forum, but I learned about M here.