Fibonacci Retracement Calculator

Fibonacci retracement levels identify likely support and resistance zones using ratios derived from the Fibonacci sequence: 23.6%, 38.2%, 50%, 61.8%, and 78.6%.

Retracement Level = High − (High − Low) × Fibonacci Ratio
Extension Level = High + (High − Low) × (Extension Ratio − 1)

In an uptrend, draw from the swing low to swing high. Price often pulls back to the 38.2%–61.8% "golden zone" before resuming. The 61.8% level (the golden ratio) is the strongest and most-watched support zone.

Extension levels (127.2%, 161.8%) project targets beyond the original swing high — use them to set take-profit levels after a successful retracement entry.