Hello all, 

I have a bad redline and i am trying to improve it.  i'm trying to understand the MATH behind 4 betting and 5 bet shoving preflop.

Particularly, i read this in another thread a long time ago

"If you take a hand like T9s and 5bet shove, he only needs to fold about 50% of the time. This shocked me the first time I read it. Put it on the memory."

It certainly provides some interesting dynamics when you get caught shoving over a 4 bet with 78ss or whatever but i'm trying to understand the math behind it.  I ran the poker stove numbers and making this play type play it seems we have a solid 30% equity vs villians calling range, so can somone help me understand how to break down the math.