I assume the electronic S&P mini is the best indicator for the direction of the equity market as a whole, and would be used in the top-flight equity algorithms for the component of a stock's price that is correlated to the market. But I've never actually confirmed this from an S&P mini trader. Is this true? While we're at it, what leads the S&P mini, or other best indicator of the broader market, the majority of the time? Gold, oil, dollar?