The drawing method of K-line chart in stock market and futures market includes four data: opening price, highest price, lowest price and closing price. All K-lines are centered around these four data, reflecting the general situation and price information. If you put the daily K-line chart on a piece of paper, you can get the daily K-line chart, and you can also draw the weekly K-line chart and the monthly K-line chart.

If the closing price is higher than the opening price, the K line is called the positive line, which is represented by a hollow entity. On the contrary, it is called a negative line and is represented by a black entity or a white entity. Many softwares can use colored entities to represent negative and positive lines. In the domestic stock and futures markets, red is usually used to represent the positive line and green is used to represent the negative line.

Extended data:

After the opening, the price fell. When the buyer supports it, after the two sides fight, the buyer is strong and pushes up the price all the way. Before closing, some buyers took profits and closed at the highest price. This is a reverse signal. If it appears after the surge, it means that it is a high shock. If the turnover increases greatly, the market outlook may fall. If it appears after the plunge, the market outlook may rebound.

As soon as the market opened, the buyer went to war with the seller. The buyer gained the upper hand and the price went up all the way. However, in the case of high-priced selling pressure resistance, the seller organized forces to fight back and the buyers retreated. Finally, when the price was the lowest, the seller took advantage and exerted his own strength, which made the buyer fall into the "locked" dilemma.

Baidu Encyclopedia -K-line chart