Maybe we're seeing an exhaustion gap on the SPY. The 50% retracement level between pre-crash August 08 high and March 09 low is around 99.30ish on the SPYder. We're also at the upper boundary of the broadening formation.
Gapping up after a multi month rally on waning volume, to meet a confluence of resistance is an interesting prospect.
BTW, I know this is the ES journal, but the ES isn't showing the gap, hence my reason for posting a SPY pic.