Sorry for the late response. I broke my arm and am trying to recover from that so haven't been trading much recently. I like to watch the VIX, the 2year US T bond yield and the 2 year DE bond yield. Sometimes Ill look at Gold as well for correlated markets. Id say I get the most out of watching the VIX and the 2 year UST yield. When I see the Euro climb when the 2 year UST goes up I know I'm looking for a reason to Short it. I see a lot of opportunities when there is divergence between these markets and the Euro. The man who trained me gave me a lot of confidence in trading the market this way. Also predicting where value is going to be in the next 12 to 24 hours has helped as well. Your looking to build a black box based on correlated markets?