Optimized Parameters in Metatrader Testing?

Does anyone know what the "Optimized Parameters" selections do when testing an EA?

There are 5 choices under the "Testing" tab when changing the expert properties. Under ""Optimized Parameter" you have:

1. Balance
2. Profit Factor
3. Expected Payoff
4. Maximal Drawdown
5. Drawdown Percent

Also how does checking or unchecking the "genetic algorithm" affect the final test results?

How does each one affect the test results?

I tried to find some info on google but no luck...Anyone know?

Follow up question...

When testing...are "optimized" or "non optimized" results a better indication of what to expect in live trading?

There used to be data available in alpari UK but i dont see it any more

Where can we import data for testing? any help is greatly appreciated

Thanks for all replies

I have the same question. Anyone?