The main contract is the continuation of the main contract, that is, the main contract is the mechanical connection of all the main contracts to form a continuous contract, and the daily trading volume and positions are the largest, which will form a relatively continuous line chart. That is, the company contract subject. The main contract is to connect the main contracts in different time periods, and weight all contracts according to the volume to form an index. Obviously, the main contract has gaps due to monthly changes, and the index is the weight of all contracts, so there will be excellent continuity. Futures are mainly not commodities, but standardized tradable contracts based on specific commodities such as cotton, soybeans and oil and financial assets such as stocks and bonds. Therefore, the subject matter can be commodities or financial instruments. The futures delivery date can be one week later, one month later, three months later or even one year later.

? Hang Seng Index is an indicator reflecting the trend of blue-chip stocks in Hong Kong, and it is an Asian popularity index. At the same time, it is also widely used as an indicator to measure the performance of funds. The Hang Seng Index adopts the weighted capital market value calculation method, and there are 50 constituent stocks. The 50 constituent stocks belong to four sub-indices of industry and commerce, finance, real estate and public utilities, and the total market value accounts for about 65% of the total market value of all listed stocks on the Hong Kong Stock Exchange. If you think short-term trading is neither easy nor painful, please don't do it. The shortest short-term trading means trading every day, going in and out every day, not overnight. Long-term anxiety, don't spend the night in short-term transactions, and have a good sleep at night. Because of the short holding time, I am worried about the short holding time. Of course, one, two or three holding periods are also short-term transactions. The purpose of short-term trading is to find excitement and happiness. Don't try not to achieve this small goal.

? Short-term trading follows suit, and it is correct to follow suit. The general trend is wrong, and there is no deal in the air. When the situation is right, the odds will be much higher than the above-mentioned 50-50 split. If the situation is wrong, such as adversity, smart short-term trading itself is a long vacation, and there is absolutely no need to compete with this situation.