When a market is making move upwards or downwards, it is called a trend. Identifying the beginning and end of trends is a key part of market analysis. Trends can apply to individual assets, sectors, or even interest rates and bond yields.
The most common trends are uptrends and downtrends. Uptrend can be identified when both the high and low points of a movement are getting higher. A downtrend is when the high and low points are getting lower.