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.

Gamma levels are the overview; the three parts that make up a gamma map - walls, GEX magnets and the HVL flip - are broken down in gamma walls, GEX magnets and the HVL flip explained. When you are ready to put them to work in a session, the SPX / ES framework walks through the full routine.

FAQ

Do gamma levels predict where the market will go?

No. They are context, not signals: they show where reactions are more likely because hedging clusters there. They work best combined with your own read of trend and momentum.

Where do gamma levels come from?

From options positioning and the hedging dealers do to stay neutral as price moves. Gamma Axis recalculates the levels each session from that positioning, which is why they change from day to day.

Do I need to understand the options maths to use them?

No. You can read the levels as zones - walls that cap or support, magnets that attract, flip zones that change the regime - and plan entries, exits and risk around them without the underlying maths.

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