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Overview

The onPriceUpdated subscription allows you to receive real-time price updates for a specific cryptocurrency symbol. Price data is streamed as it becomes available from the exchange.

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Subscription

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symbol
string
required
The cryptocurrency symbol to subscribe to (e.g., “BTCUSDT”, “ETHUSDT”)

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Response

Returns a stream of Price objects with the following fields:
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symbol
string
required
The cryptocurrency trading pair symbol
​
open
decimal
required
Opening price for the current time bucket
​
high
decimal
required
Highest price in the current time bucket
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low
decimal
required
Lowest price in the current time bucket
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close
decimal
required
Most recent closing price
​
volume
decimal
Total trading volume for the time bucket
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bucket
DateTimeOffset
Timestamp for the price data bucket
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exchange
Exchange
Exchange information where the price data originated

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Examples

subscription {
  onPriceUpdated(symbol: "BTCUSDT") {
    symbol
    open
    high
    low
    close
    volume
    bucket
  }
}

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Response Example

{
  "type": "next",
  "id": "1",
  "payload": {
    "data": {
      "onPriceUpdated": {
        "symbol": "BTCUSDT",
        "open": 45230.50,
        "high": 45350.75,
        "low": 45180.25,
        "close": 45295.00,
        "volume": 123.456,
        "bucket": "2026-03-03T10:15:00Z"
      }
    }
  }
}
The subscription filters price updates server-side, only sending data for the requested symbol. This reduces bandwidth and improves performance.

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