These two factors together will be able to tell you what you could expect to make over a period of time. Expectancy is calculated with the following formula:
( Probability of winning × average win ) – ( Probability of losing × average loss )
This will give you a figure which is the average amount you can expect to make per trade. This shouldn’t be a negative amount, if it is you should look at some other method of trading since you cannot make money on a system that produces a negative expectancy. Obviously the higher this figure is the better. Now to the opportunity factor.
The opportunity factor is how often you are able to trade using your system. By multiplying your expectancy figure with your opportunity factor it will tell you how much you could expect to make over a period of time. The more opportunity you have to trade, the more money you should expect to make. This now brings us to the last component of a trading system, money management.
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