The purchase length is 1000 points. When it rises to 1050, you sell and close your position, earn 50 points and make a profit of 50× 50 = 2,500 yuan.

Sell at 1000 when shorting. When it rises to 1050, you buy and close the position. Pay attention to buying and closing positions! What you bought at 1050 is now sold at 1000, with a loss of 50 points:-50× 50 =-2,500 yuan.

Short selling means that you sell first and then buy, so that the account can be even.

One in and one out.