For years I have avidly followed the Relative Strength Index (RSI) and have found it to be a very reliable short-term trading tool. I have noticed that for Pfizer, most major rallies end when the indicator gets to the low 70's and hardly any of them get beyond RSI 75. The highest closing reading seen in the last six years was the 76.2 at one point last year.
I am not at all a trader but I decided that the next time I saw an RSI near 75, I would sell some shares short and I just did that. I like to go with the odds and the odds are that a pullback of reasonable proportions is imminent. We'll soon see if I am right.