Stocks Flow Outliers API - Cross-Symbol Equity Scanner

Endpoint

GET /v1/flow/stocks/outliers

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

Parameters

Name	In	Required	Default	Description
`limit`	query	no	20	Rows returned, clamped to `1..200`
`minTrades`	query	no	20	Minimum trades for a symbol to qualify
`windowMinutes`	query	no	240	Lookback window, clamped to `1..10080`

curl -H "X-Api-Key: YOUR_API_KEY" \
  "https://lab.flashalpha.com/v1/flow/stocks/outliers?limit=20&minTrades=100&windowMinutes=240"

import requests

resp = requests.get(
    "https://lab.flashalpha.com/v1/flow/stocks/outliers",
    headers={"X-Api-Key": "YOUR_API_KEY"}
)
data = resp.json()
print(f"{data['qualified']} of {data['tracked']} symbols qualified")

const resp = await fetch(
  "https://lab.flashalpha.com/v1/flow/stocks/outliers",
  { headers: { "X-Api-Key": "YOUR_API_KEY" } }
);
const data = await resp.json();
console.log(data.qualified + " of " + data.tracked + " symbols qualified");

API Key

Response

{
  "generatedUtc": "2026-05-12T18:42:10Z",
  "windowMinutes": 240,
  "tracked": 1840,
  "qualified": 845,
  "limit": 20,
  "outliers": [
    {
      "symbol": "NVDA",
      "tradeCount": 184200,
      "buyVolume": 2845000,
      "sellVolume": 1999800,
      "midVolume": 84200,
      "netVolume": 845200,
      "imbalancePct": 0.42,
      "skew": 1.42,
      "notional": 5840000000,
      "netNotional": 1015800000,
      "biggestTrade": 250000,
      "biggestTradeUtc": "2026-05-12T17:18:42Z",
      "biggestAgeSec": 5008,
      "lastVwap": 1202.18,
      "lastTradeUtc": "2026-05-12T18:42:08Z",
      "lastTradeAgeSec": 2
    }
  ]
}

Key Response Fields

Field	Type	Description
`generatedUtc`	string	Generation timestamp
`windowMinutes`	integer	Effective lookback window
`tracked`	integer	Symbols scanned
`qualified`	integer	Symbols that met filters
`limit`	integer	Effective output limit
`outliers[]`	array	Outlier rows (same shape as options outliers): `symbol`, `tradeCount`, `buyVolume`, `sellVolume`, `midVolume`, `netVolume`, `imbalancePct`, `skew`, `notional`, `netNotional`, `biggestTrade`, `biggestTradeUtc`, `biggestAgeSec`, `lastVwap`, `lastTradeUtc`, `lastTradeAgeSec`

Errors

Status	Description
`403`	Requires Alpha plan or higher
`502`	Upstream flow data source unavailable

About

Same response shape as options outliers, applied to the equity universe. Use minTrades to filter out thin tape and limit to cap output size. Cached 30 seconds on the server.

Common Use Cases

Unusual-equity-activity scanner: rank by absolute net notional and skew
Big-print radar: short biggestAgeSec highlights recent institutional prints
Universe screening: pair with the equity leaderboard for full top-N and outlier views
Pairs-trade idea generator: contrast skew across correlated tickers