Fibonacci Retracement
Definition
Fibonacci retracement levels are horizontal lines drawn at key ratios (23.6%, 38.2%, 50%, 61.8%, 78.6%) between a significant swing high and low — traders use these zones to identify where pullbacks within a trend may find support or resistance and the prior trend is likely to resume.
Example
“The stock ran from $20 to $32 — a $12 move. The 61.8% retracement sat at $24.59 ($32 minus $12 × 0.618). When it pulled back to $24.70 and held for two candles, that was my buy — Fibonacci confluence with the prior breakout level.”
Detailed Explanation
Fibonacci retracements come from the Fibonacci sequence (0, 1, 1, 2, 3, 5, 8, 13, 21...), where dividing adjacent numbers produces ratios that repeatedly appear in nature and, according to technical analysts, in financial markets. The key levels traders watch are 38.2% (a shallow retracement, common in strong trends), 50% (not a Fibonacci ratio but widely used as the midpoint), and 61.8% (the "golden ratio," considered the deepest retracement before a reversal becomes a new trend). The logic isn't mathematical certainty — it's the self-fulfilling nature of widely-watched levels. When enough traders place buy orders at the 61.8% level, it creates the support they're predicting.
The most reliable Fibonacci setups occur in strong, clean trending moves where the swing high and low are unambiguous. Drawing Fibonacci levels on choppy, trendless price action or on very short timeframes produces meaningless levels that won't hold. The proper technique is to identify a clear impulsive move (a strong directional push with good volume) and then draw from the start to the end of that move. The retracement levels within that move are then the zones to watch for entry as price consolidates before the next leg. On daily and weekly charts, Fibonacci levels at 38.2% and 61.8% of major swings have well-documented historical relevance in individual stocks and index movements.
Fibonacci levels gain significance through confluence — when a Fibonacci level coincides with a prior support/resistance level, a moving average, a gap fill zone, or a trendline, the probability of a reaction at that level increases substantially. Single-factor setups (price is at the 61.8% retracement alone) are weaker than multi-factor setups (price is at the 61.8% retracement AND the prior breakout level AND the 50-day SMA simultaneously). The more independent reasons for a level to hold, the more traders are watching it and acting on it, which is what ultimately determines whether the level matters.