Definitions of Upward and Downward Trend From Dow Theory

Upward Trend — An upward trend is a series of successive rallies that penetrate previous high points, interrupted by sell-offs or declines which terminate above the low points of the preceding sell-off. In other words, an uptrend is a price movement consisting of a series of higher highs and higher lows.

Downward Trend — A downward trend is a series of successive declines which penetrate previous low points, interrupted by rallies or increases which terminate below the high points of the preceding rally. In other words, a downtrend is a price movement consisting of a series of lower lows and lower highs.