1 refers to the technical term often mentioned and used in the stock and futures markets. Generally speaking, the operation time is more than five days and less than three months. Compared with short-term, the mid-line does not need to stare at the market from time to time, nor does it need high economic knowledge for long-term operation. It can analyze and study the long-term development trend of listed companies from the data and make judgments.

Midline operation:

(1), understand the general situation: usually choose to buy the market during the rising period.

(2) Avoid looking at the market every day: the middle line is different from the short line, and it is not necessary to look at the market every day to avoid affecting the operation because of looking at the market.

(3), pay attention to the band operation: the center line can buy down, but also pay attention to take profit.

(4) Don't clear positions in Man Cang: Half-position operation is more suitable for the center line, so as to better control positions and risks.

(5) Only buy familiar stocks: only buy stocks that you are familiar with, and it is best to choose leading stocks to operate.

2. The midline refers to the line segment in the triangle that connects from the midpoint of one side to the vertex of the diagonal. The midline is also a line segment, and a triangle has three midlines. The three midlines of a triangle always intersect at the same point, which is called the center of gravity of the triangle. The three median lines of any triangle divide the triangle into six parts with equal area, and the median lines all divide the triangle into two parts with equal area.