The K-line chart can be zoomed by the up or down arrow, and then the white box on the left side of the K-line will be displayed. Great wisdom can be output by excel. Follow-up: How to check yesterday's trend Answer: Switch to the K-line chart, and then put the mouse under the K-line of the date you want to see. Double-click it and it's OK. Remember to double-click it in the space directly below.