New to GEX levels? What Is GEX? explains gamma flip, call/put walls, and how dealers create mechanical support and resistance.

Endpoint

GET /v1/exposure/levels/{symbol}

Auth required (X-Api-Key) Rate Limited: Yes

Parameters

Name	In	Required	Default	Description
`symbol`	path	yes	-	Underlying symbol

curl -H "X-Api-Key: YOUR_API_KEY" \
  "https://lab.flashalpha.com/v1/exposure/levels/SPY"

import requests

resp = requests.get(
    "https://lab.flashalpha.com/v1/exposure/levels/SPY",
    headers={"X-Api-Key": "YOUR_API_KEY"}
)
data = resp.json()
print(f"Gamma Flip: {data['levels']['gamma_flip']}")
print(f"Call Wall: {data['levels']['call_wall']}")

const resp = await fetch(
  "https://lab.flashalpha.com/v1/exposure/levels/SPY",
  { headers: { "X-Api-Key": "YOUR_API_KEY" } }
);
const data = await resp.json();
console.log(`Gamma Flip: ${data.levels.gamma_flip}`);
console.log(`Call Wall: ${data.levels.call_wall}`);

API Key

Response

{
  "symbol": "SPY",
  "underlying_price": 597.505,
  "as_of": "2026-02-28T16:30:45Z",
  "levels": {
    "gamma_flip": 595.25,
    "max_positive_gamma": 600.0,
    "max_negative_gamma": 585.0,
    "call_wall": 600.0,
    "put_wall": 595.0,
    "highest_oi_strike": 600.0,
    "zero_dte_magnet": 598.0
  }
}

Key Response Fields

Field	Type	Description
`symbol`	string	Underlying symbol
`underlying_price`	number	Current price of underlying
`as_of`	string	ISO 8601 timestamp
`levels.gamma_flip`	number	Strike where net GEX crosses zero — the gamma flip point
`levels.max_positive_gamma`	number	Strike with the highest positive gamma exposure
`levels.max_negative_gamma`	number	Strike with the highest negative gamma exposure
`levels.call_wall`	number	Highest positive gamma strike acting as resistance — the call wall
`levels.put_wall`	number	Highest negative gamma strike acting as support — the put wall
`levels.highest_oi_strike`	number	Strike with the most open interest
`levels.zero_dte_magnet`	number	Strike where same-day expiration flows are concentrated — the 0DTE magnet

What Are Key Exposure Levels?

Key Levels extracts the most important price levels from the options exposure landscape. The gamma flip marks where net dealer gamma switches sign - often a major pivot. The call wall is the strike with the highest positive gamma, acting as resistance. The put wall is the strike with the highest negative gamma, acting as support. Highest OI strike and 0DTE magnet round out the picture, showing where open interest and same-day expiration flows are concentrated.

Common Use Cases

Define trading ranges - call wall as resistance, put wall as support, gamma flip as pivot
Set stop losses - place stops beyond key levels where dealer hedging pressure changes direction
Identify 0DTE magnets - pinpoint where same-day expiration activity is pulling the price
Alert on level breaks - trigger notifications when the underlying breaches the gamma flip or call/put walls
Overlay on charts - plot these levels on price charts for visual support/resistance reference
Max pain analysis - combine key levels with /v1/maxpain for full pain curve, dealer alignment overlay, and pin probability scoring

Key Exposure Levels API