Vantage FX ( round up this Trendlines series with another look at some Chart Patterns Trendlines A Trendline is usually a straight line that connects two or more price points and extends across the chart to act as a potential line of support/resistance. Sometime Trendlines do not extend and simply contain or illustrate a Chart Pattern. Today's video looks again at some Chart Patterns that use Trendlines, and encourages traders not to be afraid of moving Trendlines around to ensure they get get the correct fit.