GEX Levels
The key gamma-exposure (GEX) price levels for a ticker on a given market date, derived from per-strike net gamma exposure evaluated relative to spot:
call_wall: strike above spot with the largest positive net gamma (resistance)put_wall: strike below spot with the largest positive net gamma (support)gamma_magnet: strike with the largest-magnitude net gamma (the strongest pin)gamma_flip: interpolated price where net dealer gamma crosses zero (between the two strikes).
The levels are built from directionalized volume by default. This is the exposure dealers took on from
the day’s ask/bid sided flow, updated through the session. Pass source to derive them from another
basis instead:
vol: directionalized volume (default)oi: open interest
nearby_flips lists every zero-gamma crossing near spot, ordered by distance from it and capped at
five, with gamma_flip as its first entry. On chains with many strikes the crossings often cluster
within a dollar or two, which means no single level is decisive. The list makes that visible.
The response echoes the source used, along with date, the market date the levels describe, and
time, when the exposure snapshot behind them was calculated.
Any level may be null when there is no data for the date (or, for gamma_flip, when net gamma
does not change sign across the strike range).
To determine the gamma regime, use the sign of net gamma from
/api/stock/{ticker}/greek-exposure (call_gamma + put_gamma). Positive net gamma means price is
above the flip and hedging tends to dampen volatility. Negative net gamma means price is below the flip
and hedging tends to amplify volatility. gamma_flip is a cumulative zero-crossing that can be null
or far from spot, so do not use it for regime detection.
Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Path Parameters
A single ticker
"AAPL"
Query Parameters
A trading date in the format of YYYY-MM-DD. This is optional and by default the last trading date.
"2024-01-18T00:00:00.000Z"
Which exposure basis to derive the levels from. vol is directionalized volume — the exposure dealers took on from the day's ask/bid sided flow. oi is open interest.
vol, oi "vol"
Response
Key gamma-exposure price levels for a market date, derived from directionalized volume by default. Each level is a price as a decimal string, or null when unavailable for the date.
Strike above spot with the largest positive net gamma exposure (resistance).
"600"
A trading date in ISO format.
"2023-09-08T00:00:00.000Z"
Price where net dealer gamma crosses zero, nearest to spot — the zero-gamma level.
"560"
Strike with the largest-magnitude net gamma (the strongest pin).
"575"
Every zero-gamma crossing near spot, ordered by distance from it and capped at five.
Strike below spot with the largest positive net gamma exposure (support).
"550"
Which exposure basis to derive the levels from. vol is directionalized volume — the exposure dealers took on from the day's ask/bid sided flow. oi is open interest.
vol, oi "vol"
The UTC timestamp of the calculation
"2023-12-13T05:00:41.481Z"
