Something I have always been curious about. Since ES is arb'd to the SP500 index, and the SP500 index is a weighed average of the prices of 500 stocks, how can anyone use technical analysis on it?
I can understand using tech analysis on stocks which are directly traded, but an index is just the average of all the stocks in that index.
caféolé, your simple question deserves a simple answer
:With a minor assumption of non-lumpy liquidity, yes, both the ES and the SPX will move the same, and on T/A tools that are price-only, will obtain identical results.
But since the SPX Index doesn't *trade*, there is no volume for it -- so any volume or volume-utilizing studies (MFI, for one) are no-go. At that point, you are left with the ES future contract, which (as discussed above) is one of the more liquid things around, in the front month.
That's it.
