Some brothers say, clearly making a profit, why did I still incur losses when closing the position? This brother might not know that trading incurs transaction fees.

Contract trading has a fee of 0.02% for limit orders and 0.15% for market orders.

Opening a $100 position with 100x leverage, the transaction fee for opening and closing at market price is $10, which accounts for 10% of the principal (this is just an example, high leverage is not recommended).

At least a 10% profit is needed to be considered a true profit.

Transaction fees are really important!!!#BTC