Since the S&P channeled between about 750 and 1500 from 1996 to 2008, a channel distance of 750 points; IMO, a reasonable target for the short-mid term high (on the monthly scale) would be around 2,250 (1500+750).
I'd guesstimate the max target at around 2,500, which would give this move, starting with the resistance break at the 1500 area, the same coverage as the 1994 to 2000 move (1500 - 500; roughly).
Just trying to think in terms of symmetry, but I'm not sure if the market operates this way on increasingly larger scales of time.
Any thoughts/ insights on this that someone wouldn't mind sharing?