Trendlines

A trendline is sloping support or resistance: a straight line drawn along a market's rising lows (an uptrend line, acting as dynamic support) or falling highs (a downtrend line, acting as dynamic resistance). This article explains how trendlines are drawn and confirmed, why two points define a line but a third validates it, what slope and steepness signal, how parallel lines form channels, and the discipline needed to avoid drawing the lines you wish were there.