Lesson 6 of 6 · GEX & Dealer Positioning

Reading the GEX map

4 min · Intermediate · Smart money · Free

A snapshot, not a forecast.

A GEX map shows estimated dealer gamma exposure at each strike. The tallest positive bar is the likely resistance level. The deepest negative bar is where conditions turn amplifying. Those levels shift throughout the day as new options flow prints.

Call walls, put walls, and the flip on one map.

The CALL WALL bar at 5,580 marks where dealer selling tends to increase. The PUT WALL at 5,520 is where large put positioning sits and reactions are possible. The gamma flip at 5,540 is the level where the regime changes. Price at 5,553 is above the flip, in the dampened zone.

This one is an animated diagram in the app. See it in Vero.

The model has limits.

Dealers exposure models assume dealers are long calls and short puts, since customers tend to sell calls and buy puts for protection. That holds on average but breaks for specific tickers, around earnings, or when a large institution is a net seller of options. The map is a lens on likely behavior, not a prediction.

The GEX map shows a large positive bar at 4,500 and a flip level at 4,430. Price is at 4,450. What does that suggest?

  1. Price will definitely rally to 4,500 today
  2. The model is invalid because no bar is negative
  3. 4,500 is likely resistance and 4,430 is where market character changes
Show the answer

C. 4,500 is likely resistance and 4,430 is where market character changes. The positive bar at 4,500 marks where dealer selling tends to increase. The flip at 4,430 is where dampening gives way to amplification.

More in GEX & Dealer Positioning

All free lessons · Trading glossary

Educational content only. Not financial advice. Examples are hypothetical.