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📏 Fibonacci Calculator

Calculate retracement and extension levels. Essential support/resistance tool used by professional traders worldwide.

Answer Capsule: Fibonacci retracement levels (23.6%, 38.2%, 50%, 61.8%, 78.6%) identify potential pullback entry points in trending markets. The 61.8% golden ratio is the most watched level by institutional traders worldwide.

How Fibonacci Levels Are Calculated

Retracement Formula: Level = High −(High −Low) × Ratio

Key Levels: 23.6% (shallow pullback), 38.2% (common retracement), 50% (psychological —not true Fibonacci), 61.8% (Golden Ratio —most watched), 78.6% (deep retracement).
Extension Formula: Level = High + (High −Low) × Ratio (for upside targets at 127.2%, 161.8%, 261.8%)

Why it works: These ratios appear throughout nature, architecture, and financial markets because large groups of traders collectively watch them —creating self-fulfilling support and resistance.