Ticker

Subscribes to full ticker snapshots for one or more instruments. Snapshots are pushed at ~1 s intervals per subscribed symbol, containing prices, volume, funding, and open interest data.

Subscribe

{"op": "subscribe", "args": ["ticker:BTCUSDC_PERP"]}

Topic format: ticker:{symbol}, e.g. ticker:BTCUSDC_PERP.

Snapshot Message

{
  "channel": "ticker",
  "type": "snapshot",
  "symbol": "BTCUSDC_PERP",
  "mark_price": "67542.50",
  "last_price": "67543.00",
  "best_bid": "67542.00",
  "best_ask": "67543.00",
  "volume_24h": "1523456",
  "turnover_24h": "102834567890.50",
  "high_24h": "68100.00",
  "low_24h": "66980.00",
  "funding_rate": "0.0001",
  "open_interest": "8234567",
  "timestamp": "2025-06-15T07:30:00.123Z"
}

• mark_price: current mark price (used for liquidation and PnL)
• last_price: most recent trade price
• best_bid / best_ask: top-of-book prices
• volume_24h: 24-hour trading volume in contracts
• turnover_24h: 24-hour turnover in quote currency
• high_24h / low_24h: 24-hour high and low prices
• funding_rate: current funding rate as a decimal (null for non-perpetual contracts)
• open_interest: total open interest in contracts
• timestamp: server-side snapshot time, ISO 8601 with milliseconds
• Each snapshot is a full replacement — same model as orderbook snapshots