Catching up is a betting strategy in which, after each loss, you increase the amount of the next bet or odds so that the first win brings a profit. In the classic version of catch-up, known as martingale, you always bet on odds of 2.00 and after losing, double your next bet.
For example, you choose a team whose matches have played under 2.5 goals several times in a row. Then you bet on total over 2.5 goals in her meetings until you win, while increasing the amount of the bet after each failure. If you bet on odds of 2.00 every time, just double your bet amount. If the odds are different, use this formula to determine the bet amount after each loss: (Loss + Target Profit) / (Odds - 1).