Personally, when I usually create different iterations of the same program, I also create a new demo account to trade the various iterations. This is because I don't want an outlier or singular event to change my logic. But I guess if this is the very beginning of a feasibility run, and there are some glaring problems, that's when I go in and fix them.

I usually don't try to optimize an EA until I get a good few months of data recorded through various market conditions.

__________________
Life is a Gamble. You win some. You lose some. And life goes on.