Well, the supports held but so far we didn't get a bounce:
As shown in the chart, if 13300 is convincingly broken, a drop to 13000 is very likely in my opinion.
So far, it's only a test of the last highs though (similar to late August). So, if the Dow holds 13300, we should continue the medium-term uptrend.
A similar situation for the SPX:
The Nasdaq Composite looks actually the worst out of the three indices: we're already at the late Augst lows:
So, tomorrow should be quite interesting. We'll see if the support levels hold.