Eicher Motors (EICHERMOT - Nifty) - impulse wave pattern

Eicher Motors (EICHERMOT - Nifty) is in ABC zigzag correction in weekly time frame, which is in 5th wave of C down in current chart. 4th wave of C was triangle, but not broken down yet. If 5th wave down is started then it should not be going above that red invalidation line of triangle and making new low.