In the world of informational text, it is filled with noise, lies, the uncertainty of risk control, and emotional thinking. Because we are surrounded by a huge information cocoon. A few people want to make money, and the best way is to make the majority foolish, with a massive amount of distorted and malicious information inevitably overwhelming you with enthusiasm that allows you to easily access it anytime and anywhere. But there is another language in this world, different from the lies of words, which is the language of mathematics, precise and definite in describing theorems and laws; you just need to make choices in calculating gains and losses to control profits and losses.