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

Works with CME index futures. Pass ES=F or NQ=F and URL-encode the = as %3D - e.g. /v1/exposure/levels/ES%3DF. Options-on-futures are priced with Black-76 using the CME multiplier ($50/pt ES, $20/pt NQ); CME index futures are Growth-tier. See the futures hub.

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 net gamma exposure (calls + puts combined)
`levels.max_negative_gamma`	number	Strike with the most negative net gamma exposure (calls + puts combined)
`levels.call_wall`	number	Strike with the highest call-only GEX, acting as resistance, see call wall
`levels.put_wall`	number	Strike with the most negative put-only GEX, acting as support, see 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 the trading range - bracket price with levels.call_wall as resistance and levels.put_wall as support to size mean-reversion entries
Pivot on the gamma flip - use levels.gamma_flip as the regime line: fade extensions above it, respect momentum below it
Place stops beyond the walls - set stops just outside levels.call_wall / levels.put_wall where dealer hedging pressure reverses, avoiding noise-driven exits
Trade the 0DTE magnet - read levels.zero_dte_magnet to anticipate where same-day expiration flow pins price into the close
Anchor on the highest-OI strike - treat levels.highest_oi_strike as a gravity point for credit-spread centers and pin expectations
Alert on level breaks - fire notifications when underlying_price breaches the gamma flip or either wall to flag a regime or breakout shift
Overlay levels on charts - plot all levels.* strikes as horizontal support/resistance bands for a visual trade map

Complementary endpoints

Gamma Exposure (GEX) - the full per-strike curve these levels are extracted from
Max Pain - pain curve and pin probability to confirm the magnet strike
Live Flow Levels - intraday flow-derived levels to cross-check the static OI walls
Flow Pin Risk - real-time pin-risk score around the gamma flip and walls

Key Exposure Levels API