Downtrends are the opposite and occur when a trading instrument is falling with lower lows. The chart below shows how the EURUSD dropped from 1.42 to 1.26 from October 2011 to January 2012. On its way down it kept making lower lows. This showed that sellers kept getting more aggressive with their selling. Just because it made lower lows doesn’t always mean it will keep going lower, but as the saying goes, Forex traders that try to pick bottom end up with smelly fingers.