# `CCXT.WS.Subscription.OpSubscribe`
[🔗](https://github.com/ZenHive/ccxt_client/blob/main/lib/ccxt/ws/subscription/op_subscribe.ex#L1)

Bybit/Bitmex-style subscribe frame.

    %{"op" => "subscribe", "args" => ["tickers.BTCUSDT", "orderbook.50.BTCUSDT"]}

Config keys: `:op_field` (default `"op"`), `:args_field` (default `"args"`).

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*Consult [api-reference.md](api-reference.md) for complete listing*