correlation? look for zones where price trends in the same direction or diverges, or where two markets turn in the same time frame. I like to look at price behind trying to compare performance can be a problem in that as time goes on volatility in one or the other could spread prices and make the chart unreadable.
green is where I think I see markets trending in the same direction, red zones are where it looks like a major shift occurred at the same time.
Market Data 
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AI
