I expect an up day tomorrow, not very sure though, because statistically the next day after FOMC tends to reverse what happens on FOMC which means a down day tomorrow as we had an up day today.

SPXandFOMC

The main reason I believe we’re going to have an up day tomorrow is that CPCI closed at 1.60, which by counting dashed lines in the following chart (whenever CPCI was closed above 1.55), clearly the odds favors bulls tomorrow.

CBOE CPCI