Nikkei 225: Short on A-B-C wave with C wave an "ending diagonal"

I believe that the recent rebound of Nikkei 225 forms as A-B-C wave 4 where C wave is potentially an "ending diagonal". If that turns out to be the case, then the breakdown from the bottom trendline will be a sharp fall.

Alternate Count:
The alternate count to take note is that the 1-2-3 will become A-B-C and A wave becomes wave 1. As for the expected wave C, it will then be an "ascending triangle".