Using trading system expectancy scores

Hi all.

Does anyone here use expectancy?

I was wondering what is a good expectancy and/or expectancy score for a trading system.

I don't know of anyone else that uses expectancy so I have no idea what is good number in this regard.

I seem to be getting an expectancy of 0.2 for most things risking 1% and targeting 2%

Thank you.

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Edit - some definitions:

Expectancy is how much you make for every $ risked per trade. So if I have an expectancy of 0.5, that means I make 0.5$ for every 1$ risked.
Expectancy = (%winners*average win)-(%losers*average loss)

Opportunity is how often you can trade with a given expectancy, the greater your opportunity to trade the better.
Opportunity = Trades per year

Expectancy Score is a combination of how often you can trade and your expectancy
Expectancy Score = expectancy*opportunity

Example:
System 1 - Expectancy of 0.2 with an opportunity to trade 100 times per year has an expectancy score of 20
System 2 - Expectancy of 0.5 with an opportunity to trade 10 times per year has an expectancy score of 5

Net Profit at years end:
System 1: +24.57% @1% risk per trade
System 2: +5.1% @1% risk per trade

The lack of responses to this thread is interesting on some level, it either suggests people don't do this analysis or that they do buy don't want to give their secrets away lol