If you place a limit order to buy something at 10.00, and then another to sell at 10.10, you can't lose, since, provided it's a big stock at least, it's almost guaranteed to reach that point eventually given how things fluctuate.
Of course, that kind of takes away from the "day" part, but hey, even if you lose that day, no reason to sell. You just wait until it goes back up. May take a few days, but... hey, profit is profit.
It's a lot easier working with absolute numbers than percentages though for obvious reasons; Pepsi is very fond of switching 40-50 cents a day. 1-2%, though? Not as likely by a large margin.