Quote from andread:
I have a question. I can understand why people look at other indices, but why do charts look so similar, even in a short timeframe? They have the same tops, the same bottoms, the same jumps. Similarities are remarkable. As if there was some kind of arbitrage.
Even volume looks similar
My guess would be that program trading is triggered in most of the markets simultaneoulsy off of the same events (technicals, news, econ. reports, etc.) I don't think what you're noticing is simply the result of "humans" in one market reacting instantly to humans moving another market.