[Stock futures trading philosophy]: What we have to do in trading is to find certainty in uncertainty, I can now say that my system can not guarantee that this time can not be earned, but I can guarantee that in two months I can earn. Wrong thinking patterns make no money, some people say, I can also make money without a system according to the feeling of buying and selling according to other people's prompts. I can say that your model is no problem once or twice, and even in the short term, you may be lucky and no problem, and in the long run you will definitely lose money.