Fed doesn't have much flexibility to send a signal

I don't see much of an opportunity for the Fed to offer a dovish signal to comfort markets. At best the Fed might reinsert what it hand in the September statement:

"Recent global economic and financial developments may restrain economic activity somewhat and are likely to put further downward pressure on inflation in the near term," the FOMC said then.

To me, that's all the Fed can really do. I think the market is looking for more. If so, watch out for USD strength against GBP and the commodity bloc.