[traz]

OH,

the light (and small) 4bet has come from light 3betting. Players are 3betting with hands that cannot stand a small 4bet. That's really all there is to it.

Sometimes they'll be getting correct odds to call, but most of their 3betting range will not be calling the 4bet.

I started doing this for awhile, but eventually I was getting bluff called and bluff 5bet (yep). So I've switched to 4bet shoving mostly.