Fibonacci Calculator
Calculate key retracement & extension levels with enhanced trend analysis
Input Parameters
Fibonacci Analysis
Retracements
Extensions
Price Trend Analysis
User Guide: Advanced Fibonacci Calculator
Learn how to effectively use our Fibonacci Calculator to identify key retracement and extension levels with precision. Master market trends and enhance your technical analysis skills.
Table of Contents
High/Low vs. Close/Close
These two buttons choose which prices define your "swing" - the price movement you're analyzing with Fibonacci levels.
| Method | Swing Start | Swing End | When to use |
|---|---|---|---|
| High/Low | Highest high in range | Lowest low in range | Classic Fibonacci - measures full price extremes including wicks |
| Close/Close | Close at period start | Close at period end | "Modern" variant often used on candles/closes for cleaner levels |
High/Low Method
Grabs the single largest high and single smallest low in your selected window (e.g., Jan 1-Dec 31). This captures the full price range including wicks.
Close/Close Method
Takes the first bar's close and the last bar's close, giving you a swing based on where price closed rather than absolute extremes. This provides cleaner levels based on actual closing prices.
These methods give slightly different ranges — choose whichever aligns with your charting style and analysis approach.
Uptrend vs. Downtrend
Fibonacci levels flip depending on whether price has moved up or down over your swing. This selection tells the calculator how to interpret your swing direction.
Uptrend
- Swing moves up from low → high
- Retracements drop down from the high (0%) back toward the low (100%)
- Extensions project above the high (beyond 0%)
Downtrend
- Swing moves down from high → low
- Retracements rise up from the low (0%) back toward the high (100%)
- Extensions project below the low (beyond 0%)
Uptrend Visualization
In an uptrend, retracement levels are calculated downward from the swing high, while extensions project upward beyond the high.
Downtrend Visualization
In a downtrend, retracement levels are calculated upward from the swing low, while extensions project downward beyond the low.
In practice, you pick either High/Low or Close/Close to set your two anchor prices, then select Uptrend or Downtrend so the calculator knows how to calculate retracements and extensions.
Historical Daily vs. Intraday
Choose the timeframe resolution for your analysis based on your trading style and objectives.
Historical Daily
- Pulls end-of-day OHLC bars (one bar per trading day)
- Great for multi-month or multi-year swings
- Use when analyzing longer-term trends on daily charts
Intraday
- Pulls OHLC bars at intervals you choose (1 min, 5 min, 15 min, etc.)
- Ideal for day-trading or capturing very short swings
- Choose your interval, then select a date range (e.g., "today only" or "last two days")
Regardless of daily vs intraday, the same calculation logic applies: the calculator scans the returned bars for your two swing endpoints (either high/low or first/last close), then calculates retracements (23.6%, 38.2%, 50%, etc.) and extensions (138.2%, 161.8%, 261.8%) around those anchors.
Step-by-Step Guide
Enter Stock Symbol
Input the ticker symbol for the stock you want to analyze (e.g., AAPL for Apple).
Choose Data Type
Select either "Historical Daily" for multi-day/year swings or "Intraday + interval" for finer intra-session analysis.
Set Date Range
Define the period for your analysis (e.g., Jan 1 2023 to Dec 31 2023).
Select Method
Choose between "High/Low" (price extremes including wicks) or "Close/Close" (candle-based closes only).
Identify Trend Direction
Select "Uptrend" if price closed higher than it opened on your swing, or "Downtrend" if it closed lower.
Calculate Results
Click the "Calculate" button to generate your Fibonacci levels.
Understanding the Results
Summary Section
Shows your swing's High, Low, Range, and the latest Close (Current).
Retracement Levels
Displays levels from 0% → 100% between your two anchors.
Extension Levels
Shows levels beyond your swing (138.2%, 161.8%, 261.8%).
Price Chart
Overlays Fibonacci levels on the price series, helping you visualize support/resistance areas.
Why Both Toggles Matter
The combination of Method (High/Low vs. Close/Close) and Trend Direction (Uptrend vs. Downtrend) provides maximum flexibility for your analysis.
Method Flexibility
If you only used High/Low + Uptrend, you'd miss the ability to analyze close-based swings or bearish moves. The toggles let you match your exact charting methodology.
Trend Flexibility
If you only used Close/Close + one trend, you couldn't flip retracements to run "bottom-up" in a downtrend. The combination handles all market conditions.
Having both toggles gives you the ultimate flexibility to experiment with different approaches and match your exact trading strategy. You can:
- Compare how different swing definitions affect your levels
- Quickly switch between bullish and bearish scenarios
- Test strategies using both wick-based and close-based levels
- Adapt your analysis to different timeframes and market conditions