# 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. Source: https://learn.tradelabsai.com/price-action/trend-lines/ Track: Price Action · Level: Beginner · Updated: 2026-10-03 Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice. Cite as: TradeLabs Learn, "Trend Lines", https://learn.tradelabsai.com/price-action/trend-lines/ 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 1. **Identify the trend** using swing structure. See [Trend Structure: Higher Highs and Lower Lows](https://learn.tradelabsai.com/price-action/higher-highs-and-lower-lows/). 2. **Uptrend:** connect at least two clear swing lows, with the line below price. 3. **Downtrend:** connect at least two clear swing highs, with the line above price. 4. **Extend the line** into the future. 5. **Look for a third touch.** Two points always make a line; a third reaction validates it. *Figure: An uptrend line drawn under rising swing lows, validated by a third touch.* ## 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](https://learn.tradelabsai.com/price-action/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](https://learn.tradelabsai.com/price-action/change-of-character/) and [Role Reversal and Retests](https://learn.tradelabsai.com/price-action/role-reversal-and-retests/). **Example: A trend line break and retest** A stock's uptrend line has three touches at $40, $44 and $48. Price closes at $49 below the line (which now sits near $51), then rallies back to $50.80, touching the underside of the line, and turns down. A trader shorts at $50.40 with a stop above $51.50, targeting the last swing low at $47. ## 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](https://learn.tradelabsai.com/price-action/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](https://learn.tradelabsai.com/price-action/price-channels/). ## Continue learning - Next lesson: [Price Channels](https://learn.tradelabsai.com/price-action/price-channels/) - Previous lesson: [Level Strength and Clustering](https://learn.tradelabsai.com/price-action/level-strength-and-clustering/) - Related: [Level Strength and Clustering](https://learn.tradelabsai.com/price-action/level-strength-and-clustering/): Not all support and resistance levels are equal. Learn the factors that make a level strong, how confluence works and how to rank and simplify your levels. - Related: [Trend Structure: Higher Highs and Lower Lows](https://learn.tradelabsai.com/price-action/higher-highs-and-lower-lows/): Uptrends make higher highs and higher lows; downtrends make lower highs and lower lows. Learn to read trend structure, spot weakening trends and trade with it. - Related: [Price Channels](https://learn.tradelabsai.com/price-action/price-channels/): A price channel is two parallel lines that contain a trend. Learn to draw ascending, descending and horizontal channels and trade bounces, targets and breakouts. - Related: [Support and Resistance](https://learn.tradelabsai.com/price-action/support-and-resistance/): Support is where buying tends to stop a fall; resistance is where selling tends to stop a rise. Learn to draw levels, judge their strength and trade them well. - Related: [Swing Highs and Lows](https://learn.tradelabsai.com/price-action/swing-highs-and-lows/): Swing highs and lows are the turning points that define market structure. Learn clear rules for marking them, fractals, timeframes and how traders use them. - Related: [Breakouts](https://learn.tradelabsai.com/price-action/breakouts/): A breakout is when price moves decisively beyond support, resistance or a pattern. Learn signs of a real breakout, entry methods, stops and how to avoid fakeouts.