Fibonacci ratios appear throughout nature — in the spiral of a nautilus shell, the branching of trees, the arrangement of sunflower seeds. Whether they appear in financial markets because of inherent mathematical properties or because millions of traders watch the same ratios and act on them — creating self-fulfilling reactions — is debated. What is not debated is that Fibonacci retracement levels consistently identify price zones that attract significant market reactions. This lesson introduces the key ratios and shows you how to use them practically.
The Fibonacci Sequence
The Fibonacci sequence begins: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144... Each number is the sum of the two before it. When you divide any number in the sequence by the one that follows it, you get approximately 0.618 — the golden ratio. Divide by the number two places ahead and you get 0.382. These ratios — and a few others derived from the sequence — form the basis of Fibonacci retracement analysis.
23.6% — Minor retracement level. Less significant, sometimes seen in very strong trends. 38.2% — First major retracement level. Strong trends often pause here before continuing. 50.0% — Not a Fibonacci ratio mathematically, but widely watched as the midpoint of a move. Very significant. 61.8% — The golden ratio. The most important Fibonacci level. Often called the "last line of defence" in a trend. 78.6% — Deep retracement level. Square root of 61.8%. Significant when a trend is weakening.
Fibonacci Retracement Levels
A Fibonacci retracement is drawn by identifying a significant price swing — from a clear low to a clear high in an uptrend — and applying the Fibonacci tool to that range. The tool then draws horizontal lines at each key ratio, showing where price might retrace to before continuing the original trend.
The rationale is that after a significant move, price rarely continues without pausing to retrace some of the move — shaking out weak positions and attracting new participants at better prices. The Fibonacci levels identify where that pause is most likely to occur.
How to Draw Fibonacci on a Chart
In MT4: Insert → Fibonacci → Retracement. Click and drag from the swing low to the swing high of the move you are measuring (for a bullish retracement). For a bearish retracement, drag from the swing high to the swing low. The tool automatically draws horizontal lines at the key ratios.
EUR/USD moved from 1.0600 (swing low) to 1.0900 (swing high) — a 300-pip move. Fibonacci levels on this move: 38.2% retracement: 1.0785 50.0% retracement: 1.0750 61.8% retracement: 1.0715 78.6% retracement: 1.0664 If price pulls back from 1.0900, these are the price zones most likely to attract buyers and produce a bounce back toward the uptrend.
Fibonacci as Entry and Exit Tool
The most practical use of Fibonacci retracements is identifying potential entry points within a trend. If the trend is clearly up and price pulls back toward the 61.8% level, and a bullish candlestick pattern forms at that level, this creates a high-probability long entry.
The power of Fibonacci multiplies when combined with other tools. A 61.8% Fibonacci level that aligns with a previous support zone and a trend line touch — what traders call confluence — is a significantly stronger signal than a Fibonacci level in isolation. Always look for confluence before acting on a Fibonacci level.
Fibonacci extensions — levels beyond 100% of the original move — are used to identify profit targets. The 127.2% and 161.8% extensions project how far the next leg of the trend might travel beyond the original swing high, giving you specific price targets to set take profit orders.