What it means
Fibonacci retracement levels are horizontal lines plotted at specific ratios (23.6%, 38.2%, 50%, 61.8%, 78.6%) of a prior price swing. To use: identify a swing high and swing low, then plot the ratios as percentage retracements of that range. Levels often act as support during pullbacks in uptrends or resistance during bounces in downtrends. Based on the Fibonacci sequence (each number is sum of prior two: 1, 1, 2, 3, 5, 8, 13...) and the golden ratio (1.618 / 0.618).
Why it matters
Fibonacci levels work empirically because so many traders watch them — self-fulfilling reaction zones at 38.2%, 50%, 61.8%. The 61.8% retracement (Golden Ratio) is the most-watched single level. Combined with structural support/resistance, Fibonacci levels at confluence become high-probability reaction zones.
How to use it
Identify a clear swing (low to high in uptrend; high to low in downtrend). Plot retracement levels. Watch for reactions at 38.2%, 50%, 61.8%, 78.6%. Best signals: Fibonacci level + horizontal support + candlestick reversal = high-conviction entry. The 78.6% level is the 'last line of defense' — beyond it, the move likely fails.
SPX swing from 4818 (Jan 2022 high) to 3491 (Oct 2022 low) = 1327-point decline. Fibonacci retracements of the bounce: 38.2% = 3998, 50% = 4155, 61.8% = 4311, 78.6% = 4534. Subsequent rally to 4194 in January 2023 = 53% retracement (between 50% and 61.8%). Subsequent rally to 4607 in July 2023 = 84% retracement. The 78.6% level acted as significant resistance.
Want a worked example or a deeper dive? Ask Rocky how this concept applies to your specific watchlist or trade idea.
Ask Rocky