A unit is your standard bet size. For example, if you typically bet $50 a game, one unit for you would be $50. We suggest betting the same amount of money each game and using 3-5% of your starting bankroll as your unit size. For example, a $50 bettor should have a bankroll of approximately $1,000 to work with.
When tracking your bets, the "u" next to the numbers stands for units won or lost.
Records for PRO Systems are based off of one unit risked for every play.