Intraday trading: news and manipulation

Michigan Consumer Sentiment Index - MCSI was displayed at 15:55 yesterday. The result was worst than expected and we were told that the stock market went down because of that. However, we could see some information leakege before 15:55. 10 minutes before, the DAX was breaking its support and going down quite a bit. Trading the news is somehow a very difficult task that it has more to do with art than science.