Essentially, there is no such thing as a limit trade within the window - right?
Not so much. One can exercise some degree of control by setting a percentage amount so if the stock moves against you by X% or greater the sale will cancel, but in the Window environment you can't set a GTC type order or 'strike price' type arrangement.
One would presume that the more liquid a stock is, the tighter the spread between bid and ask (on average). So, that to the degree that you opt for the smallest of the 4,000 (or so) stocks, the less probability you will match up orders AND the higher the probability you will pay (or sell at) market. If the spread is higher on those types of stocks (on average), then you might conclude that you will be hurt on the spread most (if not nearly all) the time.
That is likely correct. Still I'm not sure what the greatest spread on the 'universe' that they have is. Not sure how you'd find that easily either.. interesting thought!
I think Foliofn's target audience is the 'regular Joe' who's got a little grubstake of a few thousand and wants to have more control over his investments rather than going off on 'blind faith' that the mutual fund he might have otherwise selected will do better. Daunted by the high costs of trading at a regular brokerage, Foliofn levels the playing field a bit, giving access to investment strategies that would otherwise be out of this guy's league. But, in so doing they can't be all things to all people. In your case of being a "microcapper" Foliofn would not be the place for that sort of investing. I've seen software for momentum trades that look for stocks in the <=$10 range - most of these are not in the Foliofn "universe."
I hope you find a place that excels in that sort of market. Let us know what you find out in that regard as the two may complement each other, since they're both in quite separate leagues.
Best,
AIMster
News 
Market Data 
Discover 
