One more thing to consider: What are the big players, e.g. Hedgefonds are doing, this give you also an idea, what to look for. You will not find a system, but still its funny to see, that there are fonds investing all the eggs in one basket. Others invest most of the money in 3-5 Instruments. I don't know how accurate the information is, but it might help someone: http://whalewisdom.com/report/heat_map