40 day SP500 price range forecast by Investolution

It is predicted that S&P 500 Index will not close under 977 and over 1,063 between the dates July 2, 2010 and August 27, 2010. This prediction method was accurate for 47.0% and 77.0% of the cases (for minimum and maximum predictions, respectively) within an error margin of +-5% in the past.