Harry S. Dent is one of my heroes, one the market and economic forcaster which has been the most accurate and reliable (and coincidently, he is a deflationist for the current economic collapse).
He just published on YouTube a March video update to his newsletter, and his conclusion is that the rally is probably going to go higher, up to 1240 on the S&P until May, and that you should start selling at this point.
That said, since every market crash in history (or every one of those I have heard about) occured in the between June and late October and that generally speaking, November to May are bull months, he's not taking a major risk in his forecast. But it's interesting to note that.
Coincidently, Arch Crawford was also mentioning the same kinds of targets and timeframes...