Observing the Wheat daily chart we can observe a five allmost completed, started with a leading diagonal followed by a combination for wave ii, then a clear and extended wave iii, and an another combination (a bit shorter in time than wave ii) an then what seems to be a ending diagonal.
If wave i and v travels the same amount of price, the ending diagonal should end at 613, but if the wave iv, divides the whole five, the drop can get as low as 569.