There's also the theory that says when the market is acting totally irrationally, just flip a coin and you will be right half the time. The difficulty, of course, is in knowing when the market is being irrational versus just responding to normal trading pressures. We try not to pat ourselves on the back too much when we get lucky, nor beat ourselves up too much when the market throws us a curve. The bottom line is that whatever your strategy, you don't need much of an edge to beat the market.