At present, the K-line chart of HSI futures market only contains four data: opening price, highest price, lowest price and closing price. Generally speaking, all K-line charts are drawn around these four data, reflecting the general situation of the market and basic price information.

In addition, the cycle of the K-line chart can also be changed. K-line chart can be divided into daily K-line, weekly K-line, monthly K-line and annual K-line by cycle. Generally, weekly K-line and monthly K-line are commonly used to study and judge the mid-term market. General short-term operators like to use 5-minute K-line and 15-minute K-line.