I hear what you are saying about price rules momentum, but on the other hand, without momentum, I would have to disagree with your speeding train analogy. I'm in with a 25% position at 502, looking to add another 25% tomorrow if it breaks today's low. Looking to increase further next week (first week of a new month) (very likely to a full position) if further weakness presents itself. I have a 65% conviction that negative news headlines will fuel the down move, although I have little idea at this time what those forthcoming news headlines might be.