Fibonacci Calculator — Retracement & Extension Levels

Tools / Fibonacci Calculator

Fibonacci Calculator

Enter a swing high and low — get every retracement and extension level, with the golden pocket highlighted, drawn on a mini chart. Runs entirely in your browser.

HOW TO USE IT
  1. Find one clean impulse leg on your chart. That is a single directional move — a swing low up to a swing high in an uptrend, or a swing high down to a swing low in a downtrend. Getting this leg right matters more than anything else here: measure the wrong swing and every level below is wrong.
  2. Enter the swing high and the swing low. Use the extreme wick prices of that leg, not the candle bodies.
  3. Set the trend direction. Choose up if the impulse ran from the low to the high (you are looking for a pullback down into support), or down if it ran high to low (a bounce up into resistance).
  4. Read the retracement levels. These are where a normal pullback may pause — 38.2%, 50%, 61.8% and 78.6%. The shaded band between 0.618 and 0.65 is the golden pocket, the zone most traders watch.
  5. Use the extensions as targets. The 1.272 and 1.618 levels project beyond the end of the move, which is how you set a target before you enter rather than guessing afterwards.
  6. Wait for confirmation before acting on a level. Price reaching a level proves nothing on its own — a confirmation candle closing in your direction is what turns a line into a setup.
Worked example. A move from 100 up to 120 gives a 20-point leg. The 0.618 level sits at 120 − (20 × 0.618) = 107.64, and 0.65 at 107.00 — so the golden pocket is roughly 107.00–107.64. New to this? Start with the full retracement guide.
Educational tool — not financial advice. Prefer it automated? FibScanner applies these levels across 293 markets for you.