Proportional means similar in size or amount to something else.
A proportional amount represents your betting stakes, while the amount it corresponds to represents your betting bank.
To use this strategy, you have to bet a percentage of your bankroll and increase the bet value after each winning wager by a similar percentage.
Let's say that you have a bankroll of $10,000 and decide to bet 3%. Your initial bet would be $300.
When you win the wager, you must add your winnings and calculate 3% of your new bankroll for your next wager.
Thus, if you won $300, you would have a total of $10,300.
If you calculate 3% of the new amount, you will have to bet $309.
Pros and cons
A proportionate bet protects your bankroll. The theory behind betting a small percentage of your bankroll is that you won't run out of funds.
Besides a staking plan, a bankroll, and discipline, proportional betting promotes good habits and improves long-term success.
Slow growth to the bankroll. Return on capital (percentage of profit made relative to your starting bank) will be very low and grow slowly in the short term.