Fibonacci Retracement: What It Is and How to Draw It

What is Fibonacci retracement?

Fibonacci retracement is not the Fibonacci number sequence itself but a drawing tool that applies ratios derived from it to a price chart. Prices rarely move in a straight line: after an advance they give part of it back before looking for direction again. The tool marks the proportions of that pullback where a reaction may appear.

The sequence is known from the rabbit problem in Leonardo of Pisa's (Fibonacci's) Liber Abaci of 1202: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55… Each number is the sum of the two before it. The crypto technical analysis guide sets out where the tool fits; in practice it is a ratio-based form of support and resistance.

The levels and where they come from

As the sequence grows, the ratio of consecutive numbers approaches the golden ratio of about 1.618, which is why 61.8% is the best-known level. The mathematics behind the ratios is solid; prices respecting them is a market convention, not a law of nature.

How to draw it: swing low to swing high

The tool needs two points:

1. In an uptrend: draw from a clear swing low to the swing high. Levels are laid out from the top down and show where a pullback may find a reaction.
2. In a downtrend: draw from the swing high to the swing low. Levels run from the bottom up and show where a relief rally may struggle.

Two things matter: the swing must be clear (obvious highs and lows on the chart, not minor wiggles), and the choice between wicks and closing prices must be consistent. Two people who pick different swings get different levels.

Worked example (a 100 to 200 advance)

Suppose price rises from 100 to 200 (illustrative numbers). The swing is 100 long. Retracement levels measured down from the high are:

• 23.6%: 200 − 100 × 0.236 = 176.4
• 38.2%: 200 − 100 × 0.382 = 161.8
• 50%: 200 − 100 × 0.5 = 150
• 61.8%: 200 − 100 × 0.618 = 138.2
• 78.6%: 200 − 100 × 0.786 = 121.4

In a decline from 200 to 100 the same ratios are measured up from the low: 123.6 for 23.6%, 138.2 for 38.2%, 150 for 50%, 161.8 for 61.8% and 178.6 for 78.6%.

Fibonacci extensions in brief

Retracement levels sit inside the swing. When price moves beyond the swing, traders watch extension ratios instead, most commonly 127.2%, 161.8% and 261.8%. In the 100 to 200 example, the 127.2% extension measured from the low lands at 227.2 and the 161.8% extension at 261.8. Extensions are used to discuss possible reaction zones when price is at new highs; because the starting point of the measurement differs between platforms, always state where it is measured from.

How to read it: reaction zones, not certainties

Read Fibonacci levels as zones, not exact lines. A pullback into the 38.2%-61.8% area fits the scenario of a healthy correction within the main trend; a close below 78.6% is consistent with the trend weakening.

A level matters more when other tools point to the same place:

• an old resistance area lines up with a Fibonacci ratio;
• the level coincides with a pivot point or a moving average;
• trading volume rises on the reaction and a candlestick pattern supports the turn;
• RSI is turning back from an extreme.

Even then, no ratio promises a reaction.

Some analysts apply Fibonacci to more than one swing on the same chart, for example to the latest advance and to a larger move that lasted months. Where levels from different swings fall very close together, the area is called a Fibonacci cluster; it marks a broader reaction zone than any single level. Timeframe matters too: levels drawn on a weekly swing are watched by more participants than those from a 15-minute swing.

Limits

• Swing choice is subjective. The output depends entirely on which high and low are chosen; on the same chart, different people draw different levels.
• Self-fulfilling effect. Levels may hold not because the ratios carry a natural force but because many participants place orders at the same prices. When fewer people watch, the effect fades.
• Hindsight always finds a level. Five levels cover most of the swing, so price almost always turns near one of them. Backward-looking examples can overstate how well the tool works.
• Not a stand-alone decision tool. Technical indicators can give false signals in volatile markets; levels belong alongside trend, volume and risk management.

Live examples

Our technical analysis pages take the highest and lowest price in the calculation window of the selected timeframe as the swing; whichever came later sets the direction, and the levels from 23.6% to 78.6% are listed. You can see this on the Bitcoin technical analysis and support and resistance levels and Ethereum technical analysis pages.

For stocks and commodities, the same calculation appears on NVIDIA technical analysis and Gold (XAU) technical analysis. To compare many assets side by side, use the crypto technical summary table and the stocks and commodities technical summary.