On the futures page, which should you choose: “USDT-margined” or “coin-margined”?
For beginners trading futures, USDT-margined contracts calculate profit and loss in a stablecoin, making it easier to understand the outcome of each trade.
Put simply, coin-margined contracts are traded in contracts, each representing a fixed USD value; USDT-margined contracts are generally ordered directly by coin quantity.
For example, $BTC : BTCUSDT calculates profit and loss in USDT, while coin-margined BTCUSD calculates it in BTC.

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