A trendline is a straight line drawn across price swing points to visualize trend direction and identify potential support or resistance. Ascending trendlines connect higher lows (uptrend support); descending trendlines connect lower highs (downtrend resistance). Trendlines are fundamental tools for analyzing and trading trends.
- Connects swing lows (uptrend) or swing highs (downtrend)
- Acts as dynamic support or resistance
- Breaks signal potential trend changes
How Trendlines Work
Trendlines visualize trend structure:
Ascending Trendline:
Price Swing Lows:
Point 1: ₹100 (first low)
Point 2: ₹110 (higher low)
Point 3: ₹118 (higher low)
Draw line connecting these lows
Line extends into future
Acts as support for future pullbacks
If price touches ₹125 on trendline:
Potential bounce point (buy opportunity)
Quick Reference: Trendline Types
| Type | Drawing | Signal |
|---|---|---|
| Ascending | Connect higher lows | Uptrend support |
| Descending | Connect lower highs | Downtrend resistance |
| Horizontal | Connect equal levels | Range support/resistance |
Example: Trading an Ascending Trendline
Uptrend Support Trade:
| Point | Price | Trendline | Action |
|---|---|---|---|
| 1 | ₹100 | Start | First anchor |
| 2 | ₹115 | Connect | Trendline drawn |
| 3 | ₹127 | Touch | Bounce, confirm support |
| 4 | ₹138 | Touch | BUY on trendline test |
| Stop | ₹135 | Below line | If trendline breaks |
Trendlines connect swing lows in uptrends or swing highs in downtrends. They show trend direction and act as dynamic support or resistance. More touches strengthen the trendline. Breaks signal potential trend changes.
Drawing Trendlines Correctly
Minimum Points
At least two points to draw; three or more confirms validity.
No Crossings
Line should not cross through price action between points.
Use Bodies or Wicks
Debate exists. Consistency matters more than which you choose.
Angle Matters
Very steep trendlines break easily. 45-degree angles are most sustainable.
Trendline Trading Strategies
Buy the Bounce
In uptrends, buy when price pulls back to trendline. Stop below the line.
Sell the Touch
In downtrends, sell when price rallies to trendline. Stop above the line.
Trade the Break
When trendline breaks with volume, trade in breakout direction.
Trendline Confluence
Trendline + horizontal support + Fibonacci = stronger level.
Trendline Breaks
Valid Break Criteria
- Close beyond the line (not just wick)
- Volume expansion
- Follow-through next session
- Retest of broken line (confirms break)
After the Break
Broken ascending trendline becomes resistance. Broken descending trendline becomes support.
Trendline Limitations
- Subjectivity – Different traders draw differently.
- Require adjustment – Trendlines need redrawing as more points form.
- Not precise – Price may overshoot or undershoot trendlines.
- Lag – By the time you have three points, move is partly over.
Common Mistakes
-
Forcing trendlines – Only draw if clear swing points exist.
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Ignoring breaks – When trendline breaks, respect the new information.
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Too many lines – Keep it simple. Major trendlines matter most.
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Steep lines – 80-degree trendlines always break. Prefer moderate angles.
How JournalPlus Tracks Trendlines
JournalPlus lets you note trendline conditions at entry, tracking whether your trendline-based trades produce consistent results.
