A method known as Momentum Investing looks to profit from the continuation of an established market trend. Investors use this trading method to buy stock that are already rising and try to sell them when they appear to have reached their high.Momentum investors tend to buy stocks that have recently experienced large price gains and sell them after a short period of time if the price falls. Many momentum investors use price and volume data to try to identify stocks that are trending up so they can buy them, and sell them when the price trend reverses.Some promoters of this investment strategy claim that buying stocks that have been rising and then selling them after a short period of time will allow an investor to make a profit in any market conditions. However, there is no guarantee that this will always be the case. In fact, it is possible for a stock that is trending up to reverse direction and fall in price.