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Best Book Ticker

Description​

There is no dedicated best-bid/ask WebSocket channel. The current best order (highest bid, lowest ask) is the first level on each side of the orderbook:{symbol} stream.

Connect to wss://api.prex.world/ws and subscribe to the order book channel. A snapshot is pushed on subscribe, followed by a full update every 500 ms (top 30 levels per side).

Subscribe​

{
  "type": "subscribe",
  "channel": "orderbook:BTCUSDT"
}

Push Example​

{
  "type": "orderbook",
  "symbol": "BTCUSDT",
  "bids": [
    { "price": "65430.00", "size": "1.2" }
  ],
  "asks": [
    { "price": "65431.00", "size": "0.5" }
  ],
  "timestamp": 1711000000000
}

The best bid is bids[0] and the best ask is asks[0] — bids are sorted descending and asks ascending by price.

See WebSocket API General Info for connection details. For a REST snapshot, use GET /fapi/v1/ticker/bookTicker.