Soybean meal futures trading is divided into four time periods: 9: 00- 10: 15,10: 30-1:30, 1: 30-3: 00. It should be noted that commodity futures have a break of10: 15-10: 30, which is not coherent. Secondly, it is easy to confuse the division of trading days. The night market of the previous day and the white market of the next day belong to the same trading day.