What is a 161.8% extension in Elliott Wave?
A 161.8% extension is the golden ratio applied beyond a swing's terminal point. In Elliott Wave, Wave 3 most commonly extends to 161.8% of Wave 1's length — measured from the Wave 2 low. It's the primary target zone for Wave 3 in trending markets.
Full Explanation
The 161.8% extension is the most-watched Fibonacci projection in Elliott Wave. It's the golden ratio (1.618) applied to a swing's length, projecting price beyond the previous extreme. For Wave 3 specifically: measure Wave 1's price range (from the impulse origin to Wave 1's peak), multiply by 1.618, and add to the Wave 2 low. The result is the most common terminal price for Wave 3. This projection is widely watched by institutional traders, which contributes to its self-reinforcing accuracy — the level often produces reactions because so many participants are watching the same target. Extensions of 261.8% and 423.6% also appear in strong impulses and Wave 3 of (3) extensions, but 161.8% is the baseline projection every Elliott Wave analyst calculates first.
- → Elliott Wave Theory Guide — the 5-3 pattern, rules, Fibonacci, wave degrees
- → How to Count Elliott Waves — 6-step process used on 108 instruments
- → Elliott Wave Fibonacci Guide — the 7 core ratios and how they're applied
- → Rules and Guidelines — the 3 absolute rules + 7 guidelines
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