By definition an extension occurs in an impulsive wave, where waves 1, 3 or 5 can be extended, being much longer than the other waves. It is quite common that one of these waves will extend, which is normally the third wave. The two other waves then tend to equal each other.
In our pattern definitions we call it an Extension1 if the first wave extends, an Extension3 if the 3rd wave extends and an Extension5 if the 5th wave extends.
Rules and guidelines
The most important rules and guidelines concerning an extended wave are:
• It is composed of 5, 9, 13 or 17 waves.
• Wave 2 cannot be longer in price length than wave 1, so it should not go beyond the
origin of wave 1.
• Wave 3 is never the shortest when compared to waves 1 and 5.
• Wave 4 cannot overlap wave 1.
• Wave 5 exceeds the end of wave 3.
• The extended wave normally shows the highest acceleration.
In which Wave
Extensions occur in waves 1, 3, 5, and in A and C waves, when compared to each other.
As a minimum it is composed of 9 waves, though 13 or 17 waves could occur. So the minimal internal structure of the 9 waves is 5-3-5-3-5-3-5-3-5. Note that the 3s mentioned are corrective waves, which could be composed of 5 waves in the case of a corrective triangle.