Which Points Should You Connect?
In an uptrend, connect at least two higher lows—three touches strengthen validity. In a downtrend, connect lower highs. Use bodies or wicks consistently; many traders use wicks for touch count and closes for break confirmation. Ignore micro swings inside noise; anchor major pivots visible on your timeframe.
A line through random bars is decoration, not analysis.
How Steep Is Too Steep?
Parabolic trendlines break sooner—shallow trends persist longer. Compare your line’s slope to prior trends on the same symbol. If price accelerates away from the line, trail stops rather than redrawing a steeper line to justify holding. Broken steep trends often revert fast.
Channels add a parallel line on the opposite boundary for range definition within trend—adjust parallel when volatility expands so the channel still contains most closes, not only wicks.
When Is a Trendline Break Meaningful?
Close beyond the line on your trading timeframe matters more than a wick poke. Volume on the break adds weight. False breaks that reclaim the line quickly suggest trap setups. Higher timeframe trendlines outweigh lower timeframe pokes unless you scalp noise intentionally.
Define break rules before entry—one close, two closes, or percent penetration—and apply the same rule on every symbol so you are not moving goalposts after a losing trendline break.
What Drawing Mistakes Are Common?
Forcing lines to fit bias. Using too many lines until every move is “explained.” Connecting highs in uptrends (wrong side). Redrawing after every bar to avoid admitting break. Extending lines far beyond data without rechecking touches.
Less is more: one primary uptrend line and one channel line beat a spiderweb of angles that lets you justify any bias after the fact.
Should You Use Log Scale for Trendlines?
On very long-term charts or stocks that moved from single digits to hundreds of dollars, log scale can make trend angles readable. Intraday and swing traders on recent months usually stay linear. Match scale to the question you are asking—multi-year trend versus this week’s channel.
How Do Trendlines Combine With Other Tools?
Confluence with horizontal S/R and Fibonacci levels strengthens setups. Measured moves sometimes project from trendline breaks. Divergence at trendline touch can warn of slowdown. Trendlines are dynamic S/R—treat them as zones with thickness, not infinite precision on every touch.
Review trendlines weekly; active trends need occasional re-anchor to latest higher low without redrawing history to avoid admitting a break that already occurred.