Collateral Currency
For Margin trading accounts you can choose USDT, XUSD, BTC, or ETH as your collateral currency.
The collateral currency does not limit your choice of trading pairs. For example, if your account uses USDT as collateral, you can still trade BTC/USD even if you don't hold any BTC or USD in your account.
Profits, losses, fees, and swaps are calculated and recorded in the account's collateral currency. If a calculation requires another currency, the amount is converted using the applicable exchange rate.