Once a person has collected all 15 of these misshapen visages, I propose simply letting the investments ride until one or another category is at least 10% above/below the others, at which point they should be rebalanced. If all goes according to this witch's brew plan, you should find the results fiendishly delicious. Of course, there is also the alternative. Please note that the week-to-week volatility of this mix could very well add or subtract thousands from your overall portfolio. So I think folks should only invest using this strategy if they have already sold their souls, or at least have extra funds available, for some serious speculation.
Assuming one discovers a taste for this "double, double, toil, and trouble" concoction, it is also advisable periodically to refresh the assets used for one's momentum, income, and short-sellers hedge ingredients. Yet beware! I have it on good authority that "something wicked this way comes."
(To repeat, the foregoing is not considered an appropriate technique for most investors. Vampires, ghouls, zombies, and such, however, might like to try it.)