In the field of investment, as in life, the question is not whether you will be knocked down, but when it will happen and whether you will then be able to rise and continue the fight. The risk of failure is an integral part of the human experience, which is especially pronounced in financial markets dominated by speculation, t. e. Willingness to accept commercial risk. The authors investigate the basis of myths, misinformation and propaganda, which are daily bombarded by investors all the media. Superstitions, attempts to apply past experience to an already changed situation, repeating “grandmother’s fairy tales” over and over again all this is revealed in the book By dispelling common misconceptions about the market, the authors propose an antidote - a scientific method that allows you to assess the real probability of making a profit. The book is addressed primarily to traders, investors, analysts and other specialists in the field of finance, but will be interesting to a wide audience.