The most consistent outcome of expecting price being near the top is when an oscillator starts heading the other way, referring to daily TF and above. As oscillators would mostly lock at times of strong trend on intraday basis, I suppose the same is to be expected on longer TFs. 90-100 does not mean much IMHO at the moment, perhaps just signal a pullback, it would only provide a partial signal to me, I would need to see other indications of a weakening market. I agree with some posters on ET that it is naive to expect a reversal at the moment, though nothing wrong with trading pullbacks and buying lows or just staying long conservatively.