Fundamentals of Forex Fundamentals
by Justin Kuepper
Know the market expectations for the data [economic indicators ], and then pay attention to whether or not the expectations are met. That is far more important than the data itself. Occasionally, there is a drastic difference between the expectations and actual results and, if there is, be aware of the possible justifications for this difference.
Source: http://www.investopedia.com/articles/trading/04/031704.asp