Trend trading is a strategy for making buy and sell decisions based on the direction of market price movements. It assumes that market prices will continue to move in a certain trend, and traders use technical analysis tools, such as moving averages and trend lines, to identify the trend direction. In an uptrend, buy on dips, and in a downtrend, sell on rallies. The core principle is to follow the trend, avoiding excessive predictions of tops and bottoms, relying on the continuation of the trend to generate profits, while reasonably setting stop-loss orders to control risk.