Fibonacci Retracement is one of the most popular tools in technical analysis, used by traders to predict potential support and resistance levels. Named after the famed Italian mathematician Leonardo Fibonacci, this technique draws from a sequence of numbers (0, 1, 1, 2, 3, 5, 8, 13...) where each number is the sum of the two preceding numbers. This sequence reveals key ratios, such as 23.6%, 38.2%, 50%, 61.8%, and 100%, which are used to identify areas where a market might retrace before continuing its trend.
One common strategy involves buying when an asset retraces to the 100% Fibonacci level (the bottom of the price move) and selling when it reaches 0% (the top). Let's break this down in detail, exploring both the mechanics and the probabilities involved.
The Fibonacci Levels in Trading
In practical terms, Fibonacci retracement levels are horizontal lines on a chart that correspond to significant percentages of a price move, typically between a peak and a trough. Traders use these levels to predict potential reversals or corrections.
100% Level: This marks the start of a major price move. If the price retraces to this level, it means it has returned to the original point of movement. This level is often considered a prime buying opportunity if the market shows signs of reversing upward.
61.8%, 50%, and 38.2% Levels: These intermediate retracement levels represent points where the price could potentially stall or reverse, especially during strong trending markets.
0% Level: This level is at the extreme end of the price move, usually marking the highest point reached before a retracement began. Selling here can capitalize on a complete retracement.
Example Fibonacci Retracement with Disney Stock (DIS):Enter preferred Data Sample in Days (30, 45, 60): 60================ DIS = 89.30 == Fibonacci Retracements ================Level Price0 0% 123.741 23.6% 114.342 38.2% 108.523 50% 103.834 61.8% 99.135 100% 83.91====================================================
The 100% Buy, 0% Sell Strategy
The concept of buying at the 100% level and selling at 0% assumes that an asset will rebound fully after a complete retracement of its price movement. For example, if a stock rises from $50 to $100 and then retraces to $50 again, buying at this 100% retracement level anticipates that the stock will rebound back to its previous high of $100.
Why Traders Like This Strategy
Risk-Reward Ratio: If you buy at the 100% retracement level, you’re effectively entering at the lowest possible point in a recent trend, giving you a favorable risk-reward ratio. Your stop-loss can be placed just below the 100% level, minimizing downside risk.
Psychological Support: The 100% level often coincides with psychological price barriers or support levels. Traders expect other participants to enter at this point, creating a self-fulfilling prophecy.
Mean Reversion Theory: This strategy aligns with the idea of mean reversion, which suggests that prices will revert to their average or recent high after extreme moves. Traders like Jim Simons of Renaissance Technologies have capitalized on similar short-term patterns in markets.
Probabilities and Fibonacci Retracement
It’s important to consider probabilities when applying Fibonacci retracements. While these levels are helpful in predicting potential support and resistance points, the market doesn't always behave perfectly. In fact, there is no guarantee that an asset will reach the 0% level after bouncing from the 100% retracement.
The Fibonacci strategy is probabilistic in nature:
Higher Probability at Intermediate Levels: Generally, there is a higher probability of a reversal at intermediate levels such as 61.8% or 50%. As you approach the 100% level, there is often more uncertainty, particularly if the asset has been trending in the opposite direction.
Mean Reversion Bias: Traders who follow mean reversion strategies, like Jim Simons, typically target small but consistent price movements, with an understanding that prices often revert to their mean in the short term. This bias aligns well with buying at 100% and selling at 0%, especially when short-term deviations are expected to revert quickly.
However, not all trades will play out this way. There’s always the risk of the market continuing in a downward trend beyond the 100% retracement level. To mitigate this, experienced traders often combine Fibonacci retracements with other indicators, such as volume, momentum oscillators, or trendlines, to confirm trade entries and exits.
Jim Simons and Mean Reversion
Jim Simons, founder of Renaissance Technologies (13F) and its flagship Medallion Fund, is renowned for using quantitative strategies rooted in mathematics, statistics, and algorithmic models. Although there is no direct evidence that Simons exclusively uses Fibonacci retracement in his trades, his overall approach is consistent with the probabilistic nature of Fibonacci retracements.
Simons is known for mean reversion strategies, where the goal is to capture small price movements and return to a normalized price after extreme deviations. The strategy of buying at 100% retracement and selling at 0% can be seen as a specialized form of mean reversion, where traders assume that the price has deviated too far from its average and will likely revert.
In interviews, it has been suggested that Simons relies heavily on short-term statistical patterns and quick reversion to the mean. His ability to identify these moments with high precision, using short time frames and modest price margins, could very well make use of Fibonacci-like retracement techniques in highly liquid, fast-moving markets.
Practical Considerations and Risk Management
As with any trading strategy, risk management is critical when using Fibonacci retracements. The 100%-0% strategy works best in markets where price tends to oscillate between ranges rather than trending strongly in one direction. Placing stop-losses just below the 100% retracement level can protect against extended losses in the event of a further market decline.
Probabilities are not certainties. Markets are driven by human behavior, and despite the mathematical appeal of Fibonacci retracements, they are no more than useful tools. Successful traders, such as Simons, know that the key to long-term success is diversification, hedging risk, and remaining adaptable.
Conclusion
Fibonacci retracements offer traders a structured way to predict potential turning points in markets, especially when combined with a probabilistic understanding of price movements. Buying at the 100% retracement level and selling at 0% represents a high-risk, high-reward strategy that aligns well with mean reversion theories, such as those used by Jim Simons at Renaissance Technologies.
While Fibonacci retracements provide useful insights, traders should always remain cautious and combine them with other technical tools and proper risk management practices to increase the probability of success. By doing so, traders can harness the power of Fibonacci retracements in their pursuit of more consistent profits in a probabilistic trading environment.
