Fibonacci Retracement Calculator — Trading Levels
Enter the swing high and swing low of a price move to instantly calculate all standard Fibonacci retracement levels (0%, 23.6%, 38.2%, 50%, 61.8%, 78.6%, 100%) plus key extension levels for technical analysis.
Trend direction
The most-watched Fibonacci retracement level (1/φ ≈ 0.618)
- 1
Swing range
100 − 70 = 30 - 2
61.8% retracement (Golden Ratio)
100 − 0.618 × 30 = 81.4600The golden ratio level (1/φ ≈ 0.618) is the most-watched retracement zone.
How does this calculator work?
Fibonacci retracement levels = High − ratio × (High − Low) for uptrends, or Low + ratio × (High − Low) for downtrends, at ratios of 23.6%, 38.2%, 50%, 61.8%, and 78.6%. The 61.8% "golden ratio" level is most watched. These are potential support/resistance zones — not guaranteed reversal points.
Formula
How this is calculated
Fibonacci retracement levels are horizontal price zones drawn on a chart by multiplying the size of a recent swing move (high minus low) by the key Fibonacci-derived ratios: 23.6%, 38.2%, 50%, 61.8%, and 78.6%. In an uptrend the levels are subtracted from the swing high (so 38.2% retracement = High − 0.382 × range); in a downtrend they are added to the swing low. The 50% level is not a Fibonacci ratio but has been widely used in technical analysis since at least the Dow Theory era. The 61.8% level — the "golden ratio" (1/φ ≈ 0.618, where φ ≈ 1.618) — is considered the most important by many traders and is often where retracements end before the original trend resumes.
Extension levels (161.8%, 261.8%) project potential targets beyond the original swing. The 161.8% extension is directly derived from the golden ratio (φ ≈ 1.618). These are used for profit targets when a new trend leg exceeds the prior swing high (uptrend) or low (downtrend).
Fibonacci retracement is a tool of technical analysis based on observed price patterns — it has no fundamental mathematical basis tied to underlying value. Levels are areas of possible support or resistance, not guarantees; price frequently moves through them. Practitioners typically combine retracement levels with other signals (volume, candlestick patterns, trend indicators) rather than using them in isolation.
Frequently asked questions
The Fibonacci sequence (1, 1, 2, 3, 5, 8, 13, …) has the property that each term approaches the golden ratio φ ≈ 1.618 when divided by its predecessor. The key ratios used in trading derive from relationships within this sequence: 0.618 ≈ 1/φ, 0.382 ≈ 1 − 0.618 ≈ φ − 1, 0.236 ≈ 0.382², and 0.786 ≈ √0.618.
Both practices are common. Using the wick (intraday extreme) captures the full price range; using the close is more conservative and reduces noise from thin-volume spikes. Many traders draw levels from both and treat the zone between the two as the support/resistance area rather than a single precise price.
The 50% level gained widespread use through Dow Theory and is included in most Fibonacci toolsets because many traders watch it, making it a self-fulfilling level in liquid markets. It is not derived from the Fibonacci sequence but is treated as a standard retracement zone alongside the true Fibonacci levels.
Also known as
TG we-Calculate Editorial Team. (2026). Fibonacci Retracement Calculator — Trading Levels [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/fibonacci-retracement-calculator
TG we-Calculate Editorial Team. "Fibonacci Retracement Calculator — Trading Levels." TG we-Calculate. 2026. https://we-calculate.com/calculator/fibonacci-retracement-calculator.
TG we-Calculate Editorial Team, "Fibonacci Retracement Calculator — Trading Levels," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/fibonacci-retracement-calculator
@misc{wecalculate_fibonacci_retracement_calculator, title = {Fibonacci Retracement Calculator — Trading Levels}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/fibonacci-retracement-calculator}}, year = {2026}, note = {TG we-Calculate} }
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