Trendline Trading: Following the Flow

Trendline trading is a swing trading strategy that captures multi-day moves by riding trends. It’s simple on the surface—draw a line, bounce off it, follow the trend—but the execution requires discipline and journaling to avoid the common pitfalls.

What Is a Trendline?

A trendline is a diagonal line drawn through two or more price touches (lows in an uptrend, highs in a downtrend). It represents the trajectory of the trend and acts as a dynamic support (in uptrends) or dynamic resistance (in downtrends).

Unlike horizontal support/resistance, trendlines move. As more time passes, the trendline shifts upward (in uptrends) or downward (in downtrends). This makes them useful for long-term swing trades where the target is continuously moving higher.

Drawing Trendlines Correctly

Uptrend Trendline

1. Find two consecutive lows (L1 and L2) where L2 is higher than L1
2. Draw a diagonal line through both lows, extending it to the right
3. Look for a third low (L3) that also touches or nearly touches the line—this confirms the trendline
4. The more touches, the stronger the trendline

Downtrend Trendline

1. Find two consecutive highs (H1 and H2) where H2 is lower than H1
2. Draw a diagonal line through both highs, extending it to the right
3. Look for a third high (H3) that also touches or nearly touches the line—confirmation
4. The more touches, the stronger the trendline

Crucial Rule: Draw Lines Before Price Approaches Most traders draw trendlines with hindsight—after price approaches the line. This is bias. Draw your trendline at the start of the trading session, before price reaches it. This eliminates hindsight and tests whether the line is real.

Trading Strategy: Bounce Off the Trendline

Setup

1. Identify a trendline with 2+ touches (3+ is better)
2. Wait for price to approach the trendline
3. Watch for a reversal candle (pin bar, engulfing, inside bar)
4. Confirm with oscillator: RSI oversold (uptrend) or overbought (downtrend)

Entry Enter on the close of the reversal candle or on a bounce signal. Don’t enter if price is already 20+ pips away from the line. Wait for the next approach.

Stop Loss Place your stop 5-10 pips beyond the trendline. In an uptrend, your stop is below the trendline. In a downtrend, your stop is above.

Profit Target Your target is typically the opposite trendline. If you’re bouncing off an uptrend line (buying the dip), your target is often a resistance level or the opposite downtrend line. If you’re bouncing off a downtrend line (shorting the rally), your target is a support level or an uptrend line.

Alternatively, use a Fibonacci extension: 1.618x the length of the initial move.

Real Example

You’re watching AUDUSD 4H chart. An uptrend has been in place for 5 days. The uptrend trendline has been drawn through three consecutive lows and is holding well. The line is climbing at about 20 pips per day (steep, but holding).

Price approaches the trendline at 0.6750. A pin bar forms with a long lower wick and a close near the high. RSI is at 32 (oversold). This is your bounce setup.

You go long 0.5 micro lots at 0.6752 (on the close of the pin bar). Your stop is 0.6740 (12 pips below trendline). Your target is 0.6850 (resistance level, 98 pips up).

Risk = 12 pips × $1 per pip × 0.5 lots = $6 (0.06% of a $10,000 account). Reward = 98 pips. Ratio = 8.17:1.

Price rallies over the next 4 days. You hold through multiple touches of the trendline. Eventually, price hits 0.6845 near your target. You close 98 pips in profit.

In your journal, you record:

• Trendline: Uptrend, 3 touches, 20 pips per day angle
• Entry: 0.6752, pin bar + RSI oversold
• Stop: 0.6740 (12 pips below line)
• Target: 0.6850 (resistance, 98 pips)
• Exit: 0.6845 (target region)
• Hold: 4 days, 3 times retested the trendline (you held all retest wicks)
• R:R: 8.17:1
• Notes: “Clean uptrend, held multiple retests, hit target”

Trendline Break Trades (Advanced)

Once a trendline breaks definitively, it often becomes the opposite (uptrend line becomes resistance, downtrend line becomes support). Some traders short the break of an uptrend line.

Break Setup

1. Watch a strong trendline
2. Price closes decisively below (for uptrend) or above (for downtrend) the line with volume
3. Enter short (on uptrend break) or long (on downtrend break) on the candle after the break
4. Stop above/below the break level
5. Target is often the opposite trendline or a previous support/resistance

Break trades are riskier than bounce trades because you’re betting the trend is ending. Most beginners are better at bounce trades. Log both and compare win rates.

Common Mistakes in Trendline Trading

Drawing Trendlines with Hindsight This is the killer error. You draw a trendline after price approaches it. This guarantees your line is biased. Instead, draw trendlines at the start of your session before price approaches them. This tests whether they’re real.

Trading Steep Trendlines A trendline climbing 50 pips per hour is exciting but fragile. It breaks easily. A trendline climbing 5 pips per hour is boring but holds. In your journal, calculate the angle (pips per hour) and track which angles have better hold rates. Most traders find shallow lines (5-15 pips per hour) are more reliable.

Holding Losers After Trendline Breaks Once a trendline breaks, your thesis is invalidated. Your stop loss should trigger immediately. Don’t hold hoping it bounces back. The break often accelerates into a reversal. Log how many times you held losers after a trendline break and fix it.

Confusing Trendline Bounces with Breakouts A bounce is when price touches the trendline and reverses. A breakout is when price closes past the trendline with volume. They’re opposites. Don’t enter a bounce trade if a breakout just occurred. Log which you intended to trade so you don’t mix signals.

Not Waiting for Confirmation Entering as soon as price touches a trendline is risky. Wait for a reversal candle and oscillator confirmation. The extra 1-2 candles of wait time dramatically improves your hit rate. Log trades with vs. without confirmation and compare.

Targeting Too Close If your trendline bounce target is only 30 pips away and your stop is 10 pips, your R:R is 3:1. That’s fine, but low-reward trades are easier to second-guess. Journal your R:R on every trade and filter for trades with 2:1 or better.

Advanced Concepts

Nested Trendlines A pair can have multiple timeframe trendlines. A major uptrend on the daily might contain a minor downtrend on the 4H. You can trade bounces off the minor trendline while the major trend is intact. This is sophisticated but powerful. Track nested lines separately in your journal.

Trendline Angle Analysis Calculate the angle for every trendline you draw: (Pips Gained) ÷ (Hours Elapsed). Log the angle and the outcome (held, broke early, broke late). Over 50 trades, you’ll see which angles perform best. This is custom edge building.

False Trendlines Sometimes two lows or highs line up by chance, not because of support/resistance. These false trendlines break immediately. In your journal, mark “real” vs. “chance” trendlines and see if you can spot the difference beforehand.

Journaling Best Practices

1. Draw Trendlines at Session Start Before price moves toward them. This removes hindsight bias.

2. Log Trendline Angle Steep (risky) or shallow (reliable). Calculate pips per hour.

3. Record Number of Touches 2 touches = weak, 3 touches = medium, 4+ = strong. Track hold rates by touch count.

4. Document Hold Duration How many days did you hold? How many times did price retest the line? This teaches you patience and volatility tolerance.

5. Track Bounce vs. Break Trades Separately Compare win rates. Most beginners are better at bounces; professionals are better at breaks.

6. Log Trendline Breaks When a line breaks, record it. Was the break clean or did price bounce back multiple times? Log whether you exited on break (good) or held hoping for a bounce (bad).

Tools

Use the Pip Calculator to size positions once you’ve identified your stop and target. Position sizing is critical for multi-day swings because your stop might be 15-20 pips, which is large compared to intraday scalps.

Final Thought

Trendline trading teaches you to follow trends without overtrading. It’s a patience game. You draw a line, wait for a bounce, enter, and hold. The key to success is discipline: draw lines before price approaches them, exit when lines break, and journal obsessively to see which angles and scenarios work.

The traders who excel at trendlines are the ones who respect the line. They don’t hold losers after a break, they don’t chase if price is already 20+ pips from the line, and they don’t trade steep, fragile lines. Start journaling trendlines on your pairs and you’ll develop intuition for which ones work.