No one knows this. Give it to me. Ha ha. It depends on what software you use. If it's a smart mouse, press and hold on the right to display the total time K-line chart you want to see. After release, a dialog box will pop up, and you can select interval statistics. In fact, the software is similar. If you want to watch it for a month, there is a better way. Make the K-line chart into a monthly K-line chart, that is, just press 6 or 7 on the numeric keypad, and you can directly see the monthly cumulative transaction volume.