This article teaches you how to calculate contract transaction fees, so you understand how each fee is calculated and how to reduce fee expenses. Calculation formula: Position value × Fee rate = Transaction fee. Position value: Amount of cryptocurrency held × Opening price = Position value. Fee rate: For ordinary users, the fee rate is 0.02% for limit orders and 0.05% for market orders. Through this calculation formula, it is clear that the transaction fee is proportional to the size of your position and the trading method. If one increases, the transaction fee will rise. Therefore, to reduce transaction fees, you only need to lower one of them. When it comes to position size, this depends on individual capital. Thus, to reduce transaction fee expenses, one can only focus on the fee rate and transaction fee. 1. Based on personal trading habits, frequently using limit orders can intuitively reduce part of the transaction fee. (Fee rate) 2. Hold BNB, transfer it to the contract account, and enable the BNB deduction option to enjoy a 10% discount on the BNB fee rate. (Fee rate) 3. Upgrading your VIP level can also lower the fee rate. (Fee rate) 4. Rebate: Based on the actual transaction fees generated by users, a proportionate rebate will be provided. (Transaction fee) As shown in the figure, his transaction fee is 36279u. If he activates the rebate, he can receive about 12600u back.