Click an ad today. There are two components to trend, direction and duration.
Markets trend in three directions, up, down and sideways.
Markets do not move consistently in one direction, but tend to be erratic. Within this erratic behaviour a trend will be present. Trends are characterized by a series of peaks and troughs. An uptrend is a series of rising peaks and troughs, a downtrend shows a series of descending peaks and troughs. A sideways tend is a series of horizontal peaks and troughs, with prices moving within a range, failing to make new highs at the top of the price range and failing to make new lows at the bottom of the price range.