1. Candle line, also known as K-line, Yin-Yang line, Bar line and Red-Black line, graphically displays the opening price, closing price, highest price and lowest price of various stocks.

2. Color represents the fluctuation direction. China is generally red and green, or hollow and real; Entity refers to the column outside the shadow line. The upper and lower sides of the column are the opening price and closing price of the current period. Specifically, the red column closed up and fell, and the green column closed up and fell.

3. It originated from19th century, and from rice market trading in Tokugawa shogunate period in Japan in18th century. It was used to calculate the daily price fluctuation of rice, and was used by the merchants in the rice market in Japan at that time to record the market and price fluctuation of rice, including the opening price, closing price, highest price and lowest price. The positive candle represents the market rise on that day, and the negative candle represents the market decline. This chart analysis method was particularly popular in China and even Southeast Asia at that time.