Fibonacci Retracement Calculator
Find key support and resistance levels using Fibonacci ratios.
For educational purposes only. This calculator does not provide trading or investment advice. Fibonacci levels are a technical analysis tool, not a prediction of future prices.
📊 Visual Analysis
What This Calculator Does
The Fibonacci Retracement Calculator computes key Fibonacci retracement and extension levels between a swing high and swing low price. Enter the high and low prices to see the 23.6%, 38.2%, 50%, and 61.8% retracement levels, along with common extension levels. These levels are used in technical analysis to identify potential support and resistance zones.
Formula
Standard retracement ratios: 23.6%, 38.2%, 50%, 61.8%
Common extension ratios: 127.2%, 161.8%
Where:
- High = The swing high price (the top of the price move)
- Low = The swing low price (the bottom of the price move)
- Ratio = The Fibonacci ratio (e.g., 0.618 for the 61.8% level)
For an uptrend, retracement levels are below the high. For a downtrend, the calculation is reversed to find levels above the low.
Input Fields Explained
Swing High Price ($)
The highest price in the move you are analyzing. This defines the top of the range for the Fibonacci calculation. Choose a significant peak that represents a clear swing high on the chart.
Swing Low Price ($)
The lowest price in the move you are analyzing. This defines the bottom of the range. The difference between the high and low is the price range over which Fibonacci levels are calculated.
Example Calculation
A stock moves from a low of $100 to a high of $150.
Range = $150 − $100 = $50
23.6% level = $150 − ($50 × 0.236) = $138.20
38.2% level = $150 − ($50 × 0.382) = $130.90
50% level = $150 − ($50 × 0.500) = $125.00
61.8% level = $150 − ($50 × 0.618) = $119.10
If the price starts pulling back from $150, these levels represent zones where the price might find temporary support. None of these levels are guaranteed to hold.
How to Read the Result
Price zones where a pullback might pause or reverse during an existing trend. The 23.6% level is a shallow retracement, while the 61.8% level is a deep retracement. These are observational levels, not guaranteed support or resistance points.
Price projections beyond the current swing high or low. Traders use these as potential price targets. Like retracements, these are reference points, not predictions.
Common Mistakes
- Treating Fibonacci levels as guaranteed reversal points. Prices frequently break through Fibonacci levels without reversing. These levels represent zones of interest, not barriers. Relying solely on them for entry and exit decisions can lead to significant losses.
- Choosing the wrong swing high and low. The retracement levels are only as meaningful as the swing points you select. Different traders may identify different highs and lows, producing entirely different levels. There is no objectively correct way to choose swing points.
- Using Fibonacci retracements in isolation. Fibonacci levels work best when combined with other forms of analysis (trend lines, moving averages, volume, fundamental analysis). Using them alone ignores the broader market context.
- Overloading the chart with too many Fibonacci grids. Drawing multiple Fibonacci retracements from different swings creates too many levels, making the chart noisy and difficult to read. Focus on the most significant recent move.
- Believing Fibonacci levels work because of the golden ratio. The mathematical elegance of Fibonacci numbers does not prove they work in financial markets. Any observed effectiveness may be due to self-fulfilling expectations (many traders watch the same levels) rather than any inherent market property.
When This Calculator Is Useful
- Identifying potential support and resistance zones in technical analysis
- Planning entry points for trades based on price pullbacks
- Setting price targets using extension levels
- Quickly computing Fibonacci levels without drawing tools on a chart
- Educational purposes to understand how Fibonacci retracements work
Limitations
- Fibonacci levels are a technical analysis tool with no proven predictive power
- Results depend entirely on which swing high and low you choose
- Prices may ignore Fibonacci levels entirely in strongly trending or volatile markets
- Does not account for market fundamentals, news events, or external factors
- Multiple traders may draw different Fibonacci grids on the same chart
- This calculator is for educational purposes only and does not constitute trading or investment advice
Frequently Asked Questions
What are Fibonacci retracement levels?
Fibonacci retracement levels are horizontal price levels derived from the Fibonacci sequence, typically set at 23.6%, 38.2%, 50%, and 61.8% of a price move. Traders plot these levels between a swing high and swing low to identify potential areas where the price may find support (during a pullback) or resistance (during a rally). These levels are widely used in technical analysis but do not guarantee that price will reverse at any specific level.
Which Fibonacci level is most important?
The 61.8% level (derived from the golden ratio) is often considered the most significant by technical analysts, followed by 38.2% and 50%. However, no Fibonacci level is inherently more important than another — their significance depends on market context, trading volume, and other factors. Different traders may emphasize different levels based on their strategy.
How do traders use Fibonacci retracements?
Traders typically look for price to retrace to a Fibonacci level after a significant move up or down, then observe whether the price reverses. They may enter trades near these levels with stop-loss orders placed beyond the next level. Fibonacci retracements are always used alongside other technical indicators and analysis methods — they are never used in isolation.
What are Fibonacci retracement levels used for?
Fibonacci retracement levels are used in technical analysis to identify potential support and resistance zones. They help traders identify where a price pullback might pause or reverse during an existing trend. Common applications include setting entry points, placing stop-loss orders, and identifying price targets. They are a planning tool, not a prediction tool.
Do Fibonacci levels predict price movements?
No. Fibonacci retracement levels do not predict future price movements. They are mathematical ratios that some traders use to identify areas of interest on a price chart. Prices may or may not react at these levels. There is no scientific evidence that markets follow Fibonacci patterns. They should be used as one of many analytical tools, not as a standalone trading signal.
What is the difference between retracement and extension levels?
Retracement levels measure how far a price might pull back within an existing trend (e.g., 23.6%, 38.2%, 50%, 61.8% of the prior move). Extension levels project where the price might go beyond the prior swing high or low (e.g., 127.2%, 161.8%). Retracements are used for pullback entries; extensions are used for price targets.
🔧 Related Calculators
Educational Disclaimer
This calculator is for educational and informational purposes only. It does not provide investment, financial, tax, or legal advice. The results are based on the inputs and assumptions you provide and may not reflect real market conditions, fees, taxes, or risks. Always do your own research or consult a qualified professional before making financial decisions.