What are gamma levels? A plain-English guide

A simple explanation of options gamma, why some prices act like magnets and others like walls, and how traders actually use them.

Gamma levels are price zones where options positioning is likely to influence how an index moves intraday. They do not predict direction. Instead, they describe where hedging flows tend to cluster, which can make some prices act like magnets and others like walls.

Start with delta and gamma

Every option has a delta: how much its price moves when the underlying moves. Gamma measures how fast that delta changes. Dealers who sell options hedge continuously, buying and selling the underlying to stay neutral. That hedging is the mechanical force behind gamma levels.

Why levels behave differently

When dealer hedging pushes price back toward a zone, that zone behaves like a magnet: moves stall and mean-revert. When hedging amplifies moves instead, price can accelerate once a level breaks.

Walls: large concentrations of positioning that tend to cap or support price.
Magnets: zones price is drawn toward into key expiries.
Flip zones: where the regime changes from stabilising to amplifying.

How to use them

Gamma levels are context, not signals. They tell you where reactions are more likely, so you can plan entries, exits and risk around them. They work best combined with your own read of trend and momentum.

SPX Evolution publishes these levels for the S&P 500 and Nasdaq-100 every session, formatted so you can drop them straight onto a chart.