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The Swing High/Swing Low Extension indicator is a powerful and advanced tool that moves beyond simple pattern recognition to provide quantified price targets and dynamic support/resistance levels. Its usefulness lies in its ability to project where price is likely to go after a swing is confirmed, making it invaluable for profit-taking and risk management.
Here's a detailed breakdown of why it's so useful for traders.
1. It Provides Measured, Objective Price Targets
This is the core function of the tool. While patterns like flags or heads and shoulders give a one-time static target, swing extensions can project multiple targets and are dynamic.
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What it does: The indicator automatically identifies significant Swing Highs (peaks) and Swing Lows (troughs). It then uses the height of a price swing (e.g., from Swing Low A to Swing High B) to project Fibonacci-based extension levels (e.g., 100%, 127.2%, 161.8%) beyond the swing high.
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Why it's useful: It removes the guesswork from setting profit targets. Instead of wondering "how far this could go," you have pre-defined, mathematically derived levels where price is likely to react. This allows for a disciplined profit-taking strategy (e.g., take ⅓ off at 100% extension, ⅓ at 127.2%, etc.).
2. It Identifies High-Probability Reversal Zones (Potential Resistance/Support)
Swing extension levels act as powerful potential support in an uptrend and resistance in a downtrend.
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What it does: After a pullback (a new swing low in an uptrend), the tool will project extension levels from the initial swing up. The 100% and 161.8% levels are particularly significant. Price will often stall, reverse, or consolidate at these levels.
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Why it's useful: It allows you to anticipate where the next battle between buyers and sellers might occur. You can look for bearish reversal candlestick patterns (like a bearish engulfing or doji) at a 127.2% extension to exit long positions or even consider short entries.
3. It Helps in Strategic Trade Management
This tool provides a framework for managing every aspect of a trade.
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Entry: While not typically an entry tool itself, it can help. For example, entering a long position on a pullback with a target at the 127.2% extension of the previous swing up.
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Profit-Taking: As mentioned, it provides clear, tiered targets.
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Stop-Loss Placement: The most logical stop-loss for a trade targeting a swing extension is often just beyond the most recent swing low (for a long trade). This defines your risk precisely.
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Why it's useful: It creates a complete "if-then" plan. *"IF price reaches the 100% extension, THEN I will sell half my position and move my stop-loss to break-even."* This eliminates emotional decision-making.
4. It Works on Any Timeframe and Any Market
The principles of swing points and Fibonacci ratios are universal.
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What it does: Whether you're a day trader on a 5-minute chart or a long-term investor on a weekly chart, the indicator identifies the same structural points.
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Why it's useful: The methodology is consistent and scalable. A swing trade on a daily chart is managed the same way as a scalp on a 1-minute chart, making it a versatile core strategy for all trading styles.
Practical Trading Example (Bullish Scenario)
Let's walk through a long trade using swing extensions.
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Identify the Swing:
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Set the Extension Tool:
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You apply the indicator from Point A ($100) to Point B ($120), and it projects targets based on that $20 move.
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The tool automatically draws key levels:
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100% Extension: $120 + $20 = $140
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127.2% Extension: $120 + ($20 * 1.272) = $145.44
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161.8% Extension: $120 + ($20 * 1.618) = $152.36
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Execute the Trade:
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Entry: You go long at $110 (the pullback to point C).
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Stop-Loss: You place your stop at $109, just below Swing Low C. Risk = $1 per share.
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Profit Targets:
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Move Stop: After reaching $140, you move your stop-loss to breakeven ($110), guaranteeing a profit on the remainder.
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Risk-to-Reward Analysis:
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Your initial risk was $1.
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Your average profit was ($30 + $35.44)/2 = $32.72 per share.
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This is an exceptional 32:1 risk-to-reward ratio on the initial risk, managed correctly.
Crucial Limitations and Tips for Use
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Not a Standalone Signal: The extension tool is not an entry indicator. It is a projection and management tool. You must use it in conjunction with other confirming signals for entry (e.g., trend, momentum divergences, candlestick patterns).
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Which Swing to Use?: The biggest challenge is selecting the correct Swing High and Swing Low to measure from. Using the most recent major swing is typically the best practice. The indicator can sometimes become "cluttered" with many levels; focus on the most relevant ones.
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It's a Zone, Not a Pinpoint: The extension levels are areas of probability, not exact prices. Price may reverse slightly before or after hitting the exact level.
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Fibonacci is Key: The most common and reliable extensions are derived from Fibonacci ratios (127.2%, 161.8%). The 100% extension is also a strong psychological target.
Summary: Why the Swing High/Low Extension Indicator is Useful
In essence, this tool is useful because it:
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Quantifies Moves: Turns price swings into measurable projections.
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Identifies Turning Points: Pinpoints high-probability areas for trend pauses or reversals.
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Enforces Discipline: Provides a structured plan for profit-taking and stop-loss management, removing emotion.
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Is Universally Applicable: Works on all timeframes and markets, from forex to stocks to cryptocurrencies.
It is the ultimate tool for traders who have moved beyond simple entry signals and want to master the more nuanced art of trade management and strategic exit planning.
Fibonacci retracement is a method of technical analysis for determining support and resistance levels. They are named after their use of the Fibonacci sequence. Fibonacci retracement is based on the idea that markets will retrace a predictable portion of a move, after which they will continue to move in the original direction.
This Ninjatrader 8 indicator will plot extension lines automatically from
most recent Swing high & low automatically on chart.
It works on any timeframe and chart type that supports swing high low, such as Renko, Heiken Ashi, Range and Tick.
The lines of a Fibonacci retracement used Fibonacci ratios determined by the Fibonacci series, typically 23.6 percent, 38.2 percent, 50 percent, 61.8 percent and 76.4 percent. They can be used to estimate support and resistance levels.
Fibonacci retracement is a practical technique that uses Fibonacci ratios to draw out levels of support and resistance, It can be applied to both short-term and long-term trends, as well as to up and downtrends. See chart below for an example.


In order to make it as simple as possible, there are only 2 inputs, which are used to detect the most recent swing high point and swing low point.
- Strength, it's the number of bars used to detect the highest and lowest price.
If Strength set to 5, it means the swing high must be greater than the highs
of at least 5 bars to its left side and at least 5 bars to its right side. It can be more than 5 bars to each side of the swing point, but it cannot be less than 5.
For more info about the swing point, please check: https://patternsmart.blogspot.com/2018/08/what-is-swing-point-swing-high-and.html

Please double-click the diagonal if you want to adjust the line style of Fibonacci retracement.

After you double-click the diagonal, you should see a popup window like this, it is the same as you change the drawing tool's property.

You can change the style of the levels, you can also remove existing levels or add a new level.

The chart below is an example of both swing high low strength inputs set to 100.

The chart below is an example of Renko bar chart.

The chart below is an example of add this indicator twice with different swing strength inputs, it's useful when you want to check both long and short term range.
