https://www.zerohedge.com/markets/what-expect-after-tomorrows-massive-option-expiration

“The short-term setup for an SPX pullback coming out of tomorrow’s Op-Ex is there, particularly as we see a “clustering” of the CTA deleveraging- and Dealer Gamma- levels not far below market.”

Maybe someone could translate this into plain English for me.
I don’t speak “quant”