Fibonacci Retracement Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

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A finance formula can look precise even when the assumptions behind it are doing most of the work. Fibonacci Retracement Calculator keeps those assumptions visible and turns the fields on this page into one focused result. On this page, it calculates retracement or extension price levels between an entered low and high.

What this calculator does

Fibonacci Retracement Calculator calculates retracement or extension price levels between an entered low and high. Its visible inputs are Trend direction, Type of Fibonacci levels, Low, High. The article follows those fields and the calculation that is actually available on this page; it does not silently add live market feeds, tax tables, legal eligibility tests, or other variables that are not present in the tool.

How to use it

Enter Trend direction, Type of Fibonacci levels, Low, High. Use the units and percentage scale shown beside each field, and keep values on the same time basis when the formula compares income, rates, prices, balances, or work hours.

How the calculation works

The calculator finds the high-low range and places the selected Fibonacci ratios across that range. In an uptrend retracement, a level is high − range × ratio; the downtrend direction mirrors the calculation.

Example

Using the page’s demonstration values (Trend direction = up; Type of Fibonacci levels = retracement; Low = 100; High = 150) and leaving the remaining defaults unchanged, the calculator returns 119.1 for fibonacci levels. Replace the sample inputs with values from the same period and definition before interpreting your own result.

How to interpret the result

Interpret the output according to the metric being calculated: a ratio, score, exchange relationship, chart level, safety incidence rate, or cost comparison. It is best for consistent measurement and scenario comparison, not for turning one metric into a complete business or investment decision.

Limitations and notes

Fibonacci levels are charting reference levels derived from the entered high and low; they do not predict that price will reverse at those levels. The levels are arithmetic reference points, not statistically validated support/resistance or a forecast of future price. This tool uses the data you enter and does not independently validate the underlying source, legal classification, market quote, accounting treatment, or workplace recordability decision. A clean calculation can still be wrong if the source data or definition is wrong.