Limit Up - Limit Down (LULD)
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Stream real-time Limit Up - Limit Down (LULD) events for specified stock tickers via WebSocket across multiple U.S. exchanges (including NYSE, Nasdaq, Cboe BZX, NYSE Arca, and NYSE American). Events signal when securities approach or breach dynamic price bands, triggering pauses, halts, or resumptions to curb volatility. This high-volume feed provides continuous intraday coverage during regular trading hours, with details on price limits, indicators, and timestamps for proactive market response.
Use Cases: Volatility monitoring, risk management, compliance tracking, trading strategy adjustments.
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Plan
Recency
Not included
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Real-time
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Real-time
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Plan HistoryNot applicable to websockets
Parameters
ticker
string
required
Specify a stock ticker or use * to subscribe to all stock tickers.
You can also use a comma separated list to subscribe to multiple stock tickers.
You can retrieve available stock tickers from our Stock Tickers API.
Response Attributes
ev
enum (LULD)
The event type.
T
string
The ticker symbol for the given stock.
h
number
The high price.
l
number
The low price.
i
array (integer)
The Indicators.
z
integer
The tape. (1 = NYSE, 2 = AMEX, 3 = Nasdaq).
t
integer
The Timestamp in Unix MS.
q
integer
The sequence number represents the sequence in which message events happened.
These are increasing and unique per ticker symbol, but will not always be
sequential (e.g., 1, 2, 6, 9, 10, 11).
Code Examples
Subscription Request
WS
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Response Object