1, k-line chart is also called candle chart, daily line, yin-yang line, etc. The most common name is -K line, which first appeared to calculate the trend of rice price, and later it can also be used in stock, futures, options and other securities markets.

2.k line is a columnar line, which consists of shadow line and entity. The hatching part above the entity is called the upper hatching and the lower hatching. Entities are divided into positive and negative lines.