Market psychology tends to roll in waves… a wave of euphoria followed by a wave of pessimism, overconfidence followed by fear. As a result, markets advance (or decline) in a volatile manner as they bounce between “overbought” and “oversold” levels. Both investors and traders are easily swept along in these buying panics or selling panics, only to find themselves jumping in near a short-term peak or selling right at a short-term bottom.