Loading ...The down can be counted as you have shown (although a 5 wave count down is also possible), regardless though it is likely imo that it is just the 3 or 5 wave A. If so, the B wave should using the rule of thumb retrace half of the A wave and then again using the rule of thumb the C down should equal the length of the A. I know you are aware of this but I post it for an IMO for the others.
aurum