None of my split personalities is wacky enough to believe CO is doing this (not that it can't be done, mind you), not even my Mr. Monk personality who has no problem checking a flight price twice daily for six months or more. (Most people don't plan as far out as yours truly.) When doing this daily checking for weeks on end, I routinely notice the price go up and down, often by seemingly set amounts. Might be $340, then $310, then $370, then back to $340, varying by $30 each time, but it's not because anyone is checking the prices. If you're paranoid, you might believe CO is messing with you personally. They're not. CO only messes with me personally. Just ask my psychiatrist at the Psychoneurotic Institute for the Very, VERY Nervous.