To participate in perpetuals trading, you must have margin trading enabled on one of your trading account(s). Once margin trading is enabled on your trading accounts, perpetuals trading capabilities will be enabled by default.
Auto-borrowing for settlement with Bullish perpetuals trading will also be enabled. With this feature your account does not need to have a balance of the settlement currency for that particular perpetual market in order to trade it. If at the end of the settlement period the trading account has an insufficient balance, the account will automatically borrow what is necessary to fulfill the account’s payment obligation. If there is an excess balance, the account will automatically use that balance to minimize the interest charges by repaying loans.