1. Methods for checking stock trend charts over the years: Tong Da Xin, Flush, Great Wisdom, King of Traders. As long as you use stock software, you can view historical charts. Of course, it also includes the market trend chart. Just press the down arrow key on the keyboard to zoom out and the graphic will be displayed.

2. Trend charts are technical graphics that display trading information such as the stock market or futures market on a coordinate chart using curves or K-lines. The horizontal axis of the coordinate is a fixed time period, the upper half of the vertical axis is the stock price or index in that time period, and the lower half shows the trading volume.