Futures has a daily settlement system. After the market closes in the afternoon, the profit and loss will be calculated and transferred. The closing profit and loss shown by overnight closing is often different from the actual profit and loss. This is not a calculation error, but a simple settlement. A matter of method.

Spot and futures trading systems are different. It is recommended that you carefully read the trading rules of their platform. There will be profit and loss calculation methods, or you can check whether your account equity is correct.