There are two types of trendlines, the upward (or uptrend) trendline and downward (downtrend) trendline. How do you draw trendlines? Easy, in 2 simple steps. Here they are:
STEP#1: Identify obvious peaks and troughs.
STEP#2(A): Connect a minimum of 2 peaks (or highs) with a line from left to right and you have a downward trendline.
STEP#2(B) Connect a minimum of 2 troughs (or lows) with a line and you have an upward trendline.