Fibonacci Calculator
Calculate Fibonacci retracement and extension levels from any swing high and low. Identify key support, resistance, and take-profit targets instantly.
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How to Use Fibonacci Levels in Trading
Fibonacci retracement levels mark where price may find support or resistance during a pullback. The most commonly watched levels are 38.2%, 50%, and 61.8% — often called the “golden zone.”
Extension levels (127.2%, 161.8%, 200%) project where price may move after completing a retracement, making them ideal for setting take-profit targets.
Combine Fibonacci levels with GrandAlgo's smart money indicators to confirm entries at key retracement zones. Our Session Fib Fan indicator automatically plots these levels on your TradingView charts.
Key Fibonacci Retracement Levels
23.6% — Shallowest retracement. Often seen in strong trends where pullbacks are minimal.
38.2% — Common in trending markets. A pullback to 38.2% suggests the trend is strong.
50.0% — Not a true Fibonacci ratio but widely used. Represents the midpoint of the move.
61.8% — The “golden ratio.” The most important single Fibonacci level. Pullbacks to 61.8% are the classic retracement trade.
78.6% — Deep retracement. If price pulls back this far, the original trend may be weakening.
In ICT methodology, the 62%–79% zone is the Optimal Trade Entry (OTE).
Fibonacci Extension Levels
-27.0% — First extension target beyond the swing.
-61.8% — Standard ICT extension target for strong moves.
-100% — Full measured move (equal distance projection).
-161.8% — Extended target for trending markets.
Extensions are used for take-profit levels, projecting where price may go beyond the original swing.
Who Is This For?
Technical traders who need precise Fibonacci retracement and extension levels from any swing high and low. Used across all markets — stocks, forex, crypto, and futures.
Worked Example
Swing low $90, swing high $110. Range = $20.
38.2% retracement = $110 - ($20 x 0.382) = $102.36.
61.8% retracement = $110 - ($20 x 0.618) = $97.64.
161.8% extension = $90 + ($20 x 1.618) = $122.36.
Assumptions & Edge Cases
- Fibonacci levels are based on mathematical ratios, not predictive signals.
- Effectiveness depends on market context and confluence with other levels.
- Works on any timeframe but higher timeframes produce stronger levels.
Frequently Asked Questions
Fibonacci retracement levels are horizontal lines on a chart that indicate potential support and resistance based on ratios derived from the Fibonacci sequence. The key levels (23.6%, 38.2%, 50%, 61.8%, 78.6%) represent how far price has pulled back relative to a prior swing. Traders use them to identify entry points during pullbacks within a trend.
The 61.8% level (the golden ratio) is the most widely watched and most reliable Fibonacci level. In ICT methodology, the zone between 61.8% and 78.6% is called the Optimal Trade Entry (OTE) — the area where institutional rebalancing most frequently occurs during healthy trend pullbacks.
Draw from the swing low to the swing high in an uptrend, or swing high to swing low in a downtrend. The swing points must be structurally significant — confirmed by a break of structure, not just any minor high or low. The 0% level should be at the start of the move and 100% at the end.