The 90's called. They want their poker strategy back.

Poker is not about reading your opponents "tells". That is a myth perpetuated by Hollywood and ... professional poker players.

While there definitely could be some value in using psychological manipulation to best your "live" opponent, gaining some advantage via a physical tell is a crap shoot at best except against the absolute worst players or the biggest mark.

I did play with a guy for several sessions who would consistently shake his leg whenever he had a good hand. I felt so bad for him (after busting him a few times) that I told him about it so he'd fix the shaking.