Trend Lines
Trend lines connect swing lows in an uptrend or swing highs in a downtrend. Learn the rules for drawing them, how to trade bounces and breaks, and common errors.
A trend line is a straight diagonal line drawn across swing points to show the direction and slope of a trend. In an uptrend, it connects rising swing lows; in a downtrend, it connects falling swing highs. Trend lines act as dynamic support or resistance, help you visualise how steep a trend is and give an early signal when that trend changes.
How to draw a trend line#
- Identify the trend using swing structure. See Trend Structure: Higher Highs and Lower Lows.
- Uptrend: connect at least two clear swing lows, with the line below price.
- Downtrend: connect at least two clear swing highs, with the line above price.
- Extend the line into the future.
- Look for a third touch. Two points always make a line; a third reaction validates it.
Drawing choices that matter#
| Choice | Guidance |
|---|---|
| Wicks or bodies | Either works; be consistent. Wicks capture extremes, bodies ignore spikes |
| Linear or logarithmic chart | For long term charts with large percentage moves, log scale often gives better lines |
| Steepness | Very steep lines break quickly; lines near 30 to 45 degrees tend to be more durable, though the angle depends on chart scaling |
| Number of touches | Three or more reactions make a line far more meaningful |
Trading trend lines#
Bounce trades#
In an uptrend, buy pullbacks to the trend line when price shows a reaction, with a stop below the line or below the latest swing low. Best when the line aligns with a horizontal support level. See Level Strength and Clustering.
Break trades#
A decisive close through a trend line suggests the trend is weakening. A break alone does not prove a reversal; price often moves sideways after breaking a trend line. Many traders wait for a retest of the broken line from the other side, or a change in swing structure, before trading the reversal. See Change of Character and Role Reversal and Retests.
Trend line problems#
- Subjectivity: two traders often draw slightly different lines. Use clear swing points and be consistent.
- Redrawing to fit: adjusting a line every time it breaks defeats its purpose. If price breaks it decisively, accept it.
- Too steep: lines drawn during parabolic moves usually break soon.
- False breaks: wicks through the line that close back on the right side are common.
Trend lines and channels#
Drawing a parallel line through the opposite swing points creates a channel, which also shows likely areas for profit taking. See Price Channels.
Common mistakes#
- Drawing lines through only two points and treating them as strong.
- Ignoring the timeframe: trend lines on higher timeframes are more reliable.
- Assuming a break means immediate reversal.
- Cluttering the chart with many overlapping lines.
Frequently asked questions#
How many points are needed for a trend line?#
Two points draw the line, but a third touch is generally needed to confirm it as meaningful.
Should trend lines be drawn on wicks or candle bodies?#
Either can work. What matters is consistency, so your lines mean the same thing on every chart.
What happens when a trend line breaks?#
The trend may be weakening. Price often consolidates or retests the line from the other side before a clearer reversal develops, if one does.
Next, learn to draw full trend channels in Price Channels.
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Mentioned in
- Static vs Dynamic LevelsPrice Action
- Level Strength and ClusteringPrice Action
- Beginner Learning PathStart Here