Consider one of the simplest and most popular financial strategies used in sports rates — Martingale. She got her name in honor of the successful gambler of the nineteenth century, a regular in one of the casino in French Rivira. The term itself introduced into circulation at the beginning of the twentieth century mathematician p. Levy, who has long studied paradoxes in gambling. Initially, this strategy was used precisely when playing roulette, but it is applicable in sports rates.