Stock index futures belong to binary trading varieties, which means there are two profit directions. Simply put, you just need to buy the right direction.

For example, if the stock index futures are now 2900, and you analyze that the stock index futures may go up, then you buy the first-hand stock index futures at the price of 2900, and then the market rises to 2930 as you wish, then your account will float, winning 30*300=9000 yuan. If you close your position, you will probably earn so much, but if you don't close your position, the stock index futures will not go up after 2930.

For another example, stock index futures are also at 2900 points. If you analyze that the stock index futures may fall, then you sell the stock index futures (this is called shorting). That is to say, the price was short at 2900, but the market did not rise as you expected. By 1930, your account will lose 30*300=9000 yuan. If you close your position at this time, it will be considerable. Then it fell to 2860, then your account at this time won 40*300= 12000 yuan, and the liquidation made a profit of about this figure.

For example, I believe you know how to make money and how to lose money. As for when to buy a position and when to sell a position, it depends on your own specific situation.