What a market trend is
A trend describes the overall direction of price across a stretch of time rather than any single move. An uptrend is characterized by generally higher highs and higher lows, a downtrend by lower highs and lower lows, and a sideways or ranging market by price moving within a relatively stable band.
How trends are identified
Analysts often describe trends using trendlines, sequences of swing highs and lows, or moving averages. The same price data can look like a trend on one timeframe and a range on another, so the direction depends on the window being studied. Trends are identified after they form, not before.
Why the concept matters
Understanding trend helps traders frame their analysis and describe the environment they are studying. Trends can continue or reverse without warning, and identifying one does not indicate how long it will last. Trend analysis describes past and current behavior and does not forecast future price direction.