Fibonacci retracement

Why traders use 38.2%, 50%, and 61.8% — and whether they 'work'.

TL;DR

Fibonacci retracement levels — 23.6%, 38.2%, 50%, 61.8%, 78.6% — mark where a pullback might end before resuming. They work partly because of the math, partly because everyone watches them.

The levels

Drawn between a swing high and swing low.

→23.6% — shallow, first stop in strong trends
→38.2% — common pullback in healthy trends
→50% — not strictly Fibonacci, but heavily watched
→61.8% — golden ratio, deepest pullback before invalidation
→78.6% — trend in trouble

Drawing them

Connect a major swing high to a major swing low. Bigger swings = more meaningful levels. Avoid drawing on tiny moves — fibs on 5-min charts are noise.

Why they work

Reflexivity. Hundreds of thousands of traders watch them; orders cluster there. Combine with other signals (S/R, candlestick reversal) for higher conviction.

Worked example

Fib retracement on a stock pullback

NVDA rallied $100 to $140 over 3 months. After $140, it pulls back.

1Swing low$100
2Swing high$140
3Move size$40
423.6%$130.56
538.2%$124.72
650%$120
761.8% (golden)$115.28

Takeaway

If $124 (38.2%) holds, trend is healthy. If price slices through 61.8% ($115), trend in question.

Common mistakes

What to avoid

!Drawing fibs on noise-level swings
!Treating fibs as exact prices instead of zones
!Buying every fib mechanically — wait for confirmation
!Using fibs as the only signal

Self-check

Test yourself

Q1Which Fibonacci level is the 'golden ratio'?+

61.8%.

Q2Why might fibs work despite shaky math?+

Reflexivity — enough traders watch them that self-fulfilling order flow makes them work.

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