Yesterday's settlement: that is, the settlement price (average price) of the previous trading day, which is the weighted average price according to all the transaction quantities and the price at the time of transaction. The average price has obvious reference function for intraday operation.
Position difference: the difference between the current position and the position at the close of the previous trading day.
Masukura: What you see in this picture can be understood as the influence of current trading volume on positions, such as the details of the influence of each transaction on positions, more or less positions opened, more or less positions opened, positive trading volume and less positions closed. This is difficult to explain and has little impact on the transaction. Just look at the total position difference.