I’m not sure but the tech window must be something between 9-12 frames.
With that said, you can’t 100% react to a throw if the character has an auto-shimmy.
The throw animation takes like 4 or 5 frames to start looking like a throw, and some jabs do the same.
If you can react to a throw, you will react to a jab and get hit by the string unless you OS it like Fox is constantly training in his stream and he still gets hit by auto-shimmys.
It is 100% a guess unless you can OS it and OSing it seems pretty tricky.
We saw the world’s top caliber talent get destroyed by Cassie’s auto-shimmy in multiple tournaments. If there was a consistent way to ignore the guessing game in those mixups they’d already be using it by now.