Hi R,
I've been meaning to ask you, have you ever done any work with following market groupings? For example here is a chart of the currencies and gold. All I know for sure about groupings, or what we might call 'flocking" behavior is that when the markets are converging together it's a great time to trade, and when they are diverging not so much. I lot of analysts also call this a 'heat map" but in my experience the winning percentage from buying the leader or selling the laggard, as heat mappers instruct is no different than your average lagging indicator.

The Aussie is in yellow
Gold in orange
Euro is blue
Swiss is White
Yen is red