Aggregates (Per Second)
WS
Delayed: wss://delayed.polygon.io/stocks
Real-Time: wss://socket.polygon.io/stocks
Stream second-by-second aggregated OHLC (Open, High, Low, Close) and volume data for specified tickers via WebSocket. These aggregates are updated continuously in Eastern Time (ET) and cover pre-market, regular, and after-hours sessions. Each bar is constructed solely from qualifying trades that meet specific conditions; if no eligible trades occur within a given minute, no bar is emitted. By providing a steady flow of aggregate bars, this endpoint enables users to track intraday price movements, refine trading strategies, and power live data visualizations.
Use Cases: Real-time monitoring, dynamic charting, intraday strategy development, automated trading.
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 (A)
The event type.
sym
string
The ticker symbol for the given stock.
v
integer
The tick volume.
av
integer
Today's accumulated volume.
op
number
Today's official opening price.
vw
number
The tick's volume weighted average price.
o
number
The opening tick price for this aggregate window.
c
number
The closing tick price for this aggregate window.
h
number
The highest tick price for this aggregate window.
l
number
The lowest tick price for this aggregate window.
a
number
Today's volume weighted average price.
z
integer
The average trade size for this aggregate window.
s
integer
The start timestamp of this aggregate window in Unix Milliseconds.
e
integer
The end timestamp of this aggregate window in Unix Milliseconds.
otc
boolean
Whether or not this aggregate is for an OTC ticker. This field will be left off if false.