Hi Wrinkles,
I see 275 on SPY as a lower area for a reversal, but would like to see it move up to 276.70 or so. There is both a daily and weekly pivot in that area, and it would also be trendline resistance if it gets there today or early tomorrow. It might not make it that far, but if it does i think there are 3 good reasons for a sharp turn from there. With the recent strength, it could be a very quick turnaround, and itd make sense to fill the gap left from last week around 263.50.
Just my $0.02...
Good luck,
-Tim