Looking at the S&P 500 5 day chart, there was a distinct and strong downward trend from the last 2 days. All that changed the moment the minutes came out and the market rallied significantly.
Looking at the daily chart over the last 6 months, there was a slight peak forming in the stock market last few days. With today's announcement, its hard to say yet if the upward trend will continue due to Fed intervention. The next week, culminating with the Jackson Hole announcement (QE2 was announced there) will be instrumental in setting the tone of the market of the rest of the week.