Ending Diagonal Triangle also called as ED, in short, is one of the complex patterns of Elliott Wave. Ending Diagonal Triangle pattern occurs only in wave (E) of any impulse let it be a wave bigger wave (E) or inner wave (v) of any degree. make sure that there is wave (A), (B), (C) and (D) before the start of this pattern. because ED cannot happen anywhere, it is always a wave (E).