UNIT BETTING AND HOW IT WORKS
I'll will try to do my best here to explain it. If you are new to wagering it may seem complicated, however, it is quite simple.
A unit represents a percentage of your bankroll that you are willing to risk on each game. Once you establish the value of 1 unit it never changes. Never.
Lets assume that your starting bankroll is $500.00. Now let's assume that you are willing to wager 10% of your bankroll on each game. Thus, 1 unit = $50.00, or 10% of 500.00. If you are willing to wager 5% of your bankroll on each game, 1 betting unit would then = $25.00.
PLEASE NOTE!!! We are simplifying this system by using 10% as an example only. We do not recommend wagering 10% of your bankroll on one game. A more practical approach and the one I use is wagering 2.5 % of your bankroll on each game.
Again, once you establish how much a unit is worth, that never changes. The only think that would change is the amount of units you wager on each game. As your bankroll increases so does the amount of units per bet. For instance, if you doubled your bankroll to $1000.00 and are still willing to wager 10% of your money on each game then your wager would be 2 units instead of 1, or $100.00.
Simply put, all you need to do is decide what percentage of your bankroll you are willing to risk on a single game and convert that to a dollar figure. You now have the value of one betting unit and that value remains the same for the rest of your wagering life.
When you see a record indicating that one is up 100 units on the year, the actual money figure is not relevant. What is relevant is the units won on the year and that's the way it should be tracked.
good luck