Virtually every investor "times" the market. Market timing is the most common strategy in use today, even by the "experts."
Timing simply means buying low and selling high in an effort to buy before the markets go up and sell before the markets go down. All markets fluctuate and market timing is aimed at taking advantage of it.
Recent fraudulent activities by mutual funds and others have mislabeled some forms of market timing as fraudulent. However, the practice done legally, is neither fraudulent nor unethical. In fact, the very movement of the market is a function of investors and speculators trying to buy low and sell high - the very definition of market timing.
TimerTrac.com measures the success of "timers."