Dialing out from the short-term Sym-Tri micro management, this is where the story will be told. If SPX can bounce here and reverse the lower low to the late July low (and Sym-Tri break), the sideways dirge continues.

If it makes and holds a lower low it is probably going to 1970 or so, which would be a routine correction. Lot's of other potentials beyond the short-term, but why manage those now? There are bullish ones and bearish ones. First, this thing has not even corrected yet, really. Support noted below is a key on that.