An uptrend describes the price movement of a financial asset when the overall direction is upward. In an uptrend, each successive peak and trough is higher than the ones found earlier in the trend.
The uptrend is therefore composed of higher swing lows and higher swing highs. As long as the price is making these higher swing lows and higher swing highs, the uptrend is considered intact.
The lifecycle of a trend is typically three to four swings (highs OR lows) in duration, or an accumulation of six to eight swings (highs AND lows combined).