Trading halts

NOTE: This is the documentation for websocket channel trading_halts. Websocket access for personal use is only available through the Advanced plan. You can find fully-functional examples that stream data from many channels here:

Connect to the websocket URI: wss://api.unusualwhales.com/socket?token=<YOUR_API_TOKEN> then join the channel you wish to stream: trading_halts for live trading-state changes (halts, resumes, LULD pauses, etc.) sourced from UTP/CTA. Payload format:

[
  "trading_halts",
  {
    "ticker": "GME",
    "state": "halted",
    "reason": "LUDP",
    "time": "2026-04-27T14:31:02Z"
  }
]

Field reference

Field	Type	Description
`ticker`	string	Ticker whose trading state changed.
`state`	string	New trading state, e.g. `"halted"`, `"resumed"`, `"paused"`. Values are passed through from the upstream feed.
`reason`	string	Reason code from the upstream feed (e.g. `"LUDP"` for LULD volatility pause, `"T1"` for news pending, `""` if no reason was provided).
`time`	ISO 8601 string	When the state change occurred, UTC.

Last modified on September 28, 2026

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