---
title: "Trailing per-time-of-day flow baseline (avg + stddev)"
method: GET
path: "/v1/flow/{ticker}/baseline"
tags: ["Flow"]
---

# Trailing per-time-of-day flow baseline (avg + stddev)

`GET /v1/flow/{ticker}/baseline`

Time-of-day baseline buckets for `{ticker}` — average and standard
deviation of trade count, premium, and FIR per intraday bucket over a
configurable lookback window. The reference distribution behind
`/v1/flow/{ticker}/momentum` z-scores.

## Path parameters

- `ticker` string, required

## Query parameters

- `bucket` '1min' | '5min' | '15min' | '30min' | '1h'
- `lookback_days` integer
- `start_time_of_day` string
- `end_time_of_day` string
- `min_dte` integer
- `max_dte` integer

## Response `200`

Per-bucket baseline statistics.

- BaselineSuccess
  - `data` BaselineResponse, required
    - `ticker` string, required
    - `bucket` string, required
    - `lookbackDays` integer, required
    - `startTimeOfDay` string, required
    - `endTimeOfDay` string, required
    - `buckets` BaselineBucket[], required
      - `timeOfDay` string, required
      - `daysCount` integer, required
      - `avgTradeCount` number, required
      - `stddevTradeCount` number, required
      - `avgPremium` number, required
      - `stddevPremium` number, required
      - `avgFir` number, required
      - `stddevFir` number, required
    - `queryTimeMs` integer, required
  - `meta` Meta, required
    - `timestamp` string, date-time, required — Server-side timestamp the response was generated at.
    - `requestId` string, required — Short opaque ID for log correlation.

## Other responses

- `400` — Request validation failed.
- `401` — Missing or invalid API key.
- `402` — The account's shared Skylit credit balance is lower than this route's cost. Top up to continue. Carries `X-Credits-Remaining: 0`.
- `403` — API key revoked/expired, monthly quota exceeded, or the account's API access is suspended (`account_suspended`).
- `429` — Per-minute rate limit exceeded.
- `503` — Underlying data source temporarily unavailable, or the credit balance could not be verified (`credit_check_failed`). Safe to retry.

---

[API](https://skmtc.net/skylit/apis/flowseeker-skylit-public-api.md) · [All operations](https://skmtc.net/skylit/apis/flowseeker-skylit-public-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/skylit/flowseeker-skylit-public-api/revisions/3280190b1b24/schema)