Works with CME index futures. Pass ES=F or NQ=F and URL-encode the = as %3D — e.g. /v1/flow/levels/ES%3DF. Flow analytics recompute on intraday effective OI; options-on-futures are priced with Black-76 ($50/pt ES, $20/pt NQ). CME index futures and flow are Growth-tier. See the futures hub.

Endpoint

GET /v1/flow/levels/{symbol}

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

Parameters

Name	In	Required	Default	Description
`symbol`	path	yes	-	Underlying symbol
`expiry`	query	no	all expiries	Filter chain to a single expiry (`yyyy-MM-dd`). Omit to aggregate across all expiries

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

import requests

resp = requests.get(
    "https://lab.flashalpha.com/v1/flow/levels/SPY",
    headers={"X-Api-Key": "YOUR_API_KEY"}
)
data = resp.json()
print(f"Live gamma flip: {data['live_gamma_flip']}")
print(f"Live call wall: {data['live_call_wall']}")
print(f"Live put wall:  {data['live_put_wall']}")

const resp = await fetch(
  "https://lab.flashalpha.com/v1/flow/levels/SPY",
  { headers: { "X-Api-Key": "YOUR_API_KEY" } }
);
const data = await resp.json();
console.log(`Live gamma flip: ${data.live_gamma_flip}`);
console.log(`Live call wall: ${data.live_call_wall}`);
console.log(`Live put wall:  ${data.live_put_wall}`);

API Key

Response

{
  "symbol": "SPY",
  "as_of": "2026-05-12T18:42:10Z",
  "underlying_price": 597.505,
  "expiry": "2026-05-15",
  "live_gamma_flip": 595.50,
  "live_call_wall": 600.0,
  "live_put_wall": 595.0,
  "live_max_pain": 597.0
}

Key Response Fields

Field	Type	Description
`symbol`	string	Underlying symbol
`as_of`	string	ISO 8601 timestamp
`underlying_price`	number	Current price of underlying
`live_gamma_flip`	number	Strike where live net GEX crosses zero (the gamma flip point)
`live_call_wall`	number	Strike with highest live call GEX - the call wall (resistance)
`live_put_wall`	number	Strike with highest live put GEX - the put wall (support)
`live_max_pain`	number	Max pain strike using effective OI

Any field may be null if the underlying profile cannot resolve it (e.g., no gamma flip exists in the strike range).

About Flow Levels

Flow Levels returns the live versions of the four key technical levels traders anchor to: gamma flip, call wall, put wall, and max pain. The settled versions in /v1/exposure/levels are computed on the morning OPRA-broadcast OI and stay fixed all session. This endpoint runs the same level-detection logic on the OI simulator's effective OI, so when a wall starts losing OI or a new strike accumulates positioning, the levels move with it. Same definitions, intraday-adjusted inputs.

Common Use Cases

Trade against live walls, not stale ones - read live_call_wall as intraday resistance and live_put_wall as support, and re-anchor entries/targets as they migrate off the morning levels
Flip regime on live_gamma_flip - fade extensions and trade mean-reversion above it; respect momentum and trend below it, switching bias the moment spot crosses the live flip
Alert when the flip crosses spot - diff live_gamma_flip against underlying_price and fire when the sign flips, catching the dampening-to-amplifying handoff in real time
Set EOD targets on live_max_pain - treat the live max pain strike as the close-of-day magnet and plan exits toward it as expiry approaches
Confirm setups before sizing up - validate a long against a nearby live_put_wall or a short against live_call_wall so you only press trades the dealer book supports
Surface a "levels are shifting" signal - diff each live field against the settled /v1/exposure/levels values and flag the largest deltas as early evidence of intraday repositioning
Handle null levels gracefully - any field can be null when the profile can't resolve it (e.g. no flip in range), so gate dependent logic instead of assuming a number

Complementary endpoints

Key Levels - the settled morning baseline to diff these live levels against
Live Flow GEX - the per-strike profile these walls and the flip are derived from
Flow Pin Risk - scores how strongly price is being pulled toward the live max-pain magnet
Live Flow DEX - directional dealer positioning to pair with the gamma walls

Flow Levels API