Price

Mark price and index price for futures pairs.

Two real-time price channels are available, both futures only.

Channel	Description
MARK_PRICE	The mark price used for PnL calculation and liquidation
INDEX_PRICE	The index price derived from spot prices across exchanges

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MARK_PRICE

Subscribe

JSON

{
    "event": "subscribe",
    "arg": [{ "channel": "MARK_PRICE", "sym": "BINANCE_PERP_BTC_USDT" }]
}

Push Data

JSON

{
    "arg": { "channel": "MARK_PRICE", "sym": "BINANCE_PERP_BTC_USDT" },
    "data": { "markpx": "70277.1", "ts": "1774331699001" }
}

Field	Description
markpx	Mark price
ts	Timestamp (ms)

---

INDEX_PRICE

Subscribe

JSON

{
    "event": "subscribe",
    "arg": [{ "channel": "INDEX_PRICE", "sym": "BINANCE_PERP_BTC_USDT" }]
}

Push Data

JSON

{
    "arg": { "channel": "INDEX_PRICE", "sym": "BINANCE_PERP_BTC_USDT" },
    "data": { "indexpx": "70306.14565217", "ts": "1774331699001" }
}

Field	Description
indexpx	Index price
ts	Timestamp (ms)