Quote from piezoe:
You are absolutely correct, and all the more so the shorter the time scale.. As traders, we only monitor the markets that are correlated with the market we trade. If I notice a deviation from the expected I'll want to pay close attention. That deviation might be be telling me something important -- for example one market may be lagging creating a trading edge, or the correlation may be breaking down, it's up to me to try and figure out what is going on. The other thing to note is the time scale for any two markets being compared. Are they comparable?
Excellent! I noticed a move in EUR/USD, and I stayed until I saw the break on the way down of 1.30. It came down from a fail to break back above 1.31. It was beautiful to watch! I could see in the price the traders doing their things---including each man for himself.
Good to exchange with you!
) that there's a nice short coming up for the SPY.