Yes, futures is a daily debt-free settlement system. For example, rubber 1005 you opened your position at 24435, and your floating profit was 2000 at 24835 yesterday, but you closed your position at 24970 today, so you actually earned (24970-24435)*5=2675 points, but because of yesterday,
In this case, the data is not real daily data, only for understanding, I hope I can help you!