%%1.Trend is a continuous price movement in one direction.
2. Trend has some distance and duration that traders can enter, follow and exit so to profit from it.
A continuous price movement, if too short too soon, is not a trend , because traders would not be able to enter, follow and exit it.
3. Trend is recognizable.
A continuous price movement, if not recognizable, would be the same thing as random price movement.
That'$ practical, like a 200 period moving average..........Trends are about probabilities NOT predictions. IBD founder named it [200dma]a ''late sell signal ''; funny + true.