The Stock Indices surged today after the Fed announcement and Fed Chair Q&A. While one day does not necessarily make a trend, the rally was quite strong. The Indices closed at their highs today. This suggests follow-through tomorrow. A lot of times, after a Fed announcement, traders come back the next day with different valuation perceptions. Therefore, tomorrow will be important.
Keep in mind, the Markets spend most of their time in rotation. They have just bounced off important support. Therfore, any follow-through accompanied by strengthening internals will suggest possible rotation up through the range to test important resistance levels.