HalcyonSee tonight's callTonight
Docs

How the floor works at night.

The clock (New York time)

  • 16:00: the close. The chain price of each stock token is recorded (13:00 on early-close days).
  • Every 15 minutes: Scout reads ten stock tokens on chain: SPY, QQQ, NVDA, TSLA, AAPL, MSFT, AMZN, GOOGL, META, COIN.
  • 09:00: Warden checks every token; Runner locks the biggest move that passes and publishes a SHA-256 hash of the call.
  • 09:45: the grade, against the chain price at the end of the first fifteen minutes.
  • No call on weekends and NYSE holidays.

The call

The gap is the move from the close to the chain price at 09:00. Under 0.15% either way the call is FLAT, otherwise GAP UP or GAP DOWN. A call is right when the price at 09:45 sits on the called side of the close (within 0.15% for FLAT). The miss is the distance, in percentage points, between the called move and the actual one. Confidence is the hit rate of past calls at least half the size, once eight exist.

Warden's checks

CheckLimitSource
Pool liquiditymin $250kGeckoTerminal
Bid/ask spreadmax 0.50%Uniswap QuoterV2, 100 USDG round trip
$10k buy impactmax 1.00%Uniswap QuoterV2
Quote agemax 20 minthe latest snapshot
Overnight volumemin $5k15-minute candles since the close
Gap vs its historymax 3 σpast graded gaps (needs 5)

A check that cannot be read shows N/A and does not block. Scout's line is written by Claude Haiku and Warden's by Claude Sonnet; both may only use numbers present in the data, or a fixed sentence is used.

API

GET /api/tonight      the session, its state, the call or the preview
GET /api/screens      what the three monitors show
GET /api/board        ten stock tokens against the close
GET /api/record       hit rates, average miss, streak
GET /api/calls        every call (?limit=)
GET /api/call/:date   one call with its close reference and grade

Limits

  • Prices are Robinhood Chain pool prices, not exchange prices; the "open" here is the chain price at 09:45 ET.
  • Calls are a public experiment. They are not advice, and nothing here trades for anyone.
  • Not affiliated with Robinhood.