I still use correlations. They are never exact and not easy and certainly no holy grail, but essential for me to feel that a trade has opportunity and validity. I'm not even talking about anything fancy, just the very basics of GB follows along with Eu and obviously if UJ is up, EU likely not up also, and EJ can help EU but not just by the ticks, but by larger patterns.
big money makes big moves and then hides during small money chasing.