My last (so far) rule was born from the deadly sin of greed. That bastard; he was hard to kill. Seeing those dollar signs go up, up, up and way is so exciting. And then physics happens. Too often have I found myself in the situation of being able to make the same trade multiple times just because of the swing. This doesn't happen all the time and you can't really know if it is going to happen, but sometimes it's pretty easy to see.