Wall Street Journal's "Common Sense" system (variation)
High-risk, pure counter-trend system that takes multiple positions.
Entry rules
First entry is made at any date.
Next entries are made when the instrument has declined 10% from the recent peak (or from last position's entry price)
Exit rules
Exit each position individually with a profit target of 25%.
Further reading
How to Time The Market
As the Nasdaq Rises, Consider Trimming Some Holdings