A good medium is 3% per play. For example, if you're starting with a bankroll ofR$100, you should riskR$3 on every bet. If you're starting withR$1000, you should riskR$30 on every bet. Your unit size would beR$3 orR$30, respectively.
Martingale. The first and one of the most well-known sports betting and casino strategies on how to win is the martingale system. In its basic variant, each time you lose a bet, you should wager double on the next match. This way, whenever you win, you cover all your previous losses and gain money for the next bet.