Trendline

A trendline is a straight line drawn on a chart connecting a series of rising lows in an uptrend or falling highs in a downtrend, used to visualize the direction and pace of a trend. An upward trendline drawn under higher lows acts as dynamic support — a sloping level that rises over time — while a downward trendline drawn over lower highs acts as dynamic resistance. Most practitioners require at least two points to draw a trendline and a third touch to consider it validated.

For example, if Solana makes lows at $120, then $135, then $150 over several weeks, a line connecting those lows defines the uptrend; traders may look to buy near the line and would treat a decisive close below it as a warning that the trend is weakening.

A common misconception is that a trendline break automatically means the trend has reversed; often it only signals that momentum is slowing, and price can consolidate sideways before continuing. Trendlines are also subjective — two traders can draw slightly different lines on the same chart depending on whether they connect wicks or candle bodies — so they work best as guides combined with other evidence rather than precise triggers.