LOL...It's not as complicated as it seems...If you plan on selling, it only makes sense to make one larger purchase (I used a million shares as a round example). 1 buy and 5 sales is 6 trades, or 60 bucks commission with E-Trade. Now a move from .0005 to .0006 is a 20% gain. $60 bucks is a drop in the bucket on a 20% gain on my investment. If I bought 50 bucks worth of stock, then yes, it would be a dumb move, but I bought 100 times that (if your curious), so commission wasn't a big deal.