Overbought indicators are of little use when markets are obsessed with rate cuts ahead of a key fed speech. Jerome Powell will speak at the Jackson hole symposium and Friday, and expectations for a dovish show are high. And that's helped Wall Street indices extend gains and the allowed the ASX 200 to tag along for the ride. But if this turns out to be a classic 'buy the rumour, sell the fact' tale, traders may need to factor in some of the overbought clues on the daily chart.