Many believe useful myths about the markets they follow. If you want to manage money well, you need to understand what the prevailing myth is, grasp where it is wrong and when that will become apparent. Indeed, making good investments often rests on disagreeing with the conventional wisdom. However, you need to time your disagreement so you are not blown away by the weight of money going the other way before the truth outs.
John Redwoodchief global strategist for Charles Stanley, a UK broker, writing in the FT.
A longwinded way of saying sell the peaks & buy the troughs LOL