Trend trading is an investment strategy that attempts to leverage momentum for financial gain. If a stock is trending upward, the trader enters into a long position on it, whereas if it’s trending downward the trader enters into a short position.
By “trend” we mean that the stock is moving in a particular direction without much back-and-forth (that is, up-and-down) movement. A trend trader is assuming that the stock in question is going to continue in its particular direction for a significant enough amount of time to make it worthwhile to invest in that momentum and profit from it.
What that significant time frame is all depends on the trader in question. In fact, that time frame can be as short as, say, 15 minutes or as long as a few months. But however long his chosen time horizon is, the trend trader will remain in the position he opened until he feels that the stock has reached its resistance and is about to reverse its trending. He then closes his position and takes profits.

