Subscription parameters

format

<type>@<symbol> , where <symbol> is lowercase underscore (e.g. btc_usdt).

Examples: ticker@btc_usdt , depth@btc_usdt , depth5@btc_usdt , depth10@btc_usdt , depth20@btc_usdt , depth50@btc_usdt , depth100@btc_usdt , tickerbook@btc_usdt , deal@btc_usdt , kline_1m@btc_usdt , best_price@btc_usdt , pred_ticker@btc_usdt .

• Fixed-level depth supports levels 5 / 10 / 20 / 50 / 100; the legacy form depth@<symbol>,<level> is also accepted and is normalized (e.g. depth@btc_usdt,20).

• pred_ticker@<symbol> is only valid for prediction-market symbols; a prediction symbol is excluded from the plain ticker channel.

The full-market channels tickers and pred_tickers have no @symbol suffix.