Impulse
Extension
When one of the impulse waves (1, 3, or 5) subdivides into an elongated impulse with exaggerated subdivisions. Wave 3 extensions are most common in stock markets. The extended wave is typically 161.8% or more of the next longest wave.
EXAMPLE
A Wave 3 extension in NVDA runs $80 while Waves 1 and 5 are each approximately $30.