Can wave-2 ever be a Triangle?

ANSWER:

Except for the initial “thrust” out of a Contracting Triangle, in general Triangles do not transfer much strength to the post-Triangular pattern. Therefore, if wave-2 is part of a standard, Trending Impulse pattern, it will NEVER occur as a Triangle. But, if part of a Terminal Impulse pattern, there is an outside chance wave-2 might form a Triangle, even though I do not remember ever seeing one. Finally, for reasons mentioned at the start of this paragraph, if wave-2 ever formed a Triangle within a Terminal Impulse, the odds are very high that Terminal would contain a 1st wave extension.