Limit-Up Limit-Down (LULD)
WS
Real-Time: wss://socket.polygon.io/stocks
Stream real-time Limit Up/Limit Down (LULD) events for specified stock tickers via WebSocket. Each event indicates price volatility safeguards triggered by regulatory mechanisms, such as price bands or trading pauses, helping users identify when a security has entered or exited a limit state, halted, or resumed trading within allowable price ranges. This continuous feed enables traders, analysts, and developers to respond more effectively to sudden market movements and adjust their strategies accordingly.
Use Cases: Volatility monitoring, risk management, compliance tracking, trading strategy adjustments.
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).