Trendlines in Technical Analysis
Since price patterns are identified using a series of lines and/or curves, it is helpful to understand trendlines and know how to draw them. Trendlines help technical analysts spot areas of support and resistance on a price chart. Trendlines are straight lines drawn on a chart by connecting a series of descending peaks (highs) or ascending troughs (lows).
A trendline that is angled up, or an up trendline, occurs where prices are experiencing higher highs and higher lows. The up trendline is drawn by connecting the ascending lows. Conversely, a trendline that is angled down, called a down trendline, occurs where prices are experiencing lower highs and lower lows.
Trendlines will vary in appearance depending on what part of the price bar is used to "connect the dots." While there are different schools of thought regarding which part of the price bar should be used, the body of the candle bar—and not the thin wicks above and below the candle body—often represents where the majority of price action has occurred and therefore may provide a more accurate point on which to draw the trendline, especially on intraday charts where "outliers" (data points that fall well outside the "normal" range) may existd charts, chartists often use closing prices, rather than highs or lows, to draw trendlines since the closing.
On daily charts, chartlist closing prices, rather than highs or lows, to draw trendlines since the closing prices represent the traders and investors willing to hold a position overnight or over a weekend or market holiday. Trendlines with three or more points are generally more valid than those based on only two points.
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