There is no difference in domestic commodity futures, because the trading time of commodity futures is 4 hours a day, and there is no difference from the K-line chart. According to my many years of experience, there has never been a half-day transaction.

There are differences between stock index futures and foreign futures. For example, a variety of 24-hour transactions, a day's market, 4 hours to display 6 K-lines, a day to display only one K-line.