Gamma, delta, charm, and vanna in Expo

Gamma is the headline. It sets the flip and the walls, and decides whether dealers dampen or amplify moves. Delta shows which way the book leans, with the zero-delta pivot as its marquee level.

Charm is hedging drift from time passing, and its marquee is the pin strike, the end-of-day magnet. Vanna is hedging from volatility moving, and its marquee is the vol trigger.

Each Greek has its own colour pair, so you always know which map you're reading, and you can overlay any Greek's levels while viewing another.