See "Yes, you can time the market!, Ben Stein, Phil DeMuth, Wiley 2003" for a simple and actually investable method simply looking at the S&P500 index. The main

See "Yes, you can time the market!, Ben Stein, Phil DeMuth, Wiley 2003" for a simple and actually investable method simply looking at the S&P500 index. The main problem with it being that it's a very long term method - that would test the patience of most.