Learn · Walls
Call wall and put wall
The call wall and the put wall are the prices where the estimated gamma exposure of call options and of put options concentrates most, and on a GEX map they mark its outer bounds.
How walls are read
Traders watch the call wall as a reference above or near price and the put wall as one below or near it: areas to watch for a rejection, a bounce or a push through as price approaches. No wall is guaranteed to hold.
How well walls hold depends on the session. In a stressed market, with high or inverted volatility, walls tend to hold less well than in a calm one.
Walls move
A wall is not a fixed line. During the session the call wall or the put wall can move to another price. Late in the day, when same-day options pile up near the money, the main wall can swap between nearby strikes of similar weight; the data then gives it as a zone rather than a line that jumps.
How LiveGexLevels shows them
The walls are primary levels on the map, together with the gamma flip and the centre of mass. When a main wall is missing, a light wall may appear in its place: a hint, not a bound. A wall is weighed like any level, first by how many markets agree on it, then by its mass.
Which MCP tool returns them
get_gex_regime returns the call wall and the put wall. get_level_changes reports a wall_moved event when either one moves to another price.
Questions and answers
Will price bounce off the call wall or the put wall?
Not necessarily. Price can reject a wall, pause there or run through it. A wall is a reference to watch, not a promise of support or resistance.
Are the walls resting orders in the market?
No. They are concentrations of estimated gamma from a model, not orders in the book or confirmed positions.
Do the walls change during the day?
Yes. The map is re-estimated through the session and the walls can move with it, which is why the map records every wall move.
