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.

Similarly, if you draw a K-line chart with one minute's price data, it is called a one-minute K-line. Draw a K-line chart with one month's data, which is called a monthly K-line chart. The drawing cycle can be flexibly selected as required, and K-lines with a cycle of 2 minutes and 3 minutes can also be seen in some professional drawing software. K-line is a special market language, and different forms have different meanings.

According to the calculation cycle of K-line, it can be divided into daily K-line, weekly K-line, monthly K-line and annual K-line.

Weekly K-line refers to the K-line chart drawn with the opening price on Monday, the closing price on Friday, the highest price and the lowest price in the whole week. The monthly K-line is based on the opening price of the first trading day of a month, the closing price of the last trading day and the highest and lowest prices of the whole month. The definition of annual K-line can also be derived.

Weekly K-line and monthly K-line are often used to judge the mid-term market. For short-term operators, the 5-minute K-line, 15-minute K-line, 30-minute K-line and 60-minute K-line provided by many analysis software also have important reference value.