Look at all the ABCds though (blue = reached D, orange = failed beyond 50% of CD, red = failed at 50% of CD leg):
I think the AB legs are often due to external shocks; the pitchforks work best when there aren't too many & price can 'bounce' freely for a while; the ABCDs aim to catch the first major bounce. So they're complementary...
One rule of thumb is buy at 25% into the projected CD; with a stop at C. The tricky bit is getting C right :)
I agree with you, here's the eternal question - is the C there yet? Is it confirmed or is the swing not done yet? Maybe I'm wrong, but I think Ackerman doesn't use absolute highs and lows, only the ones that ignite the actual impulse move. That's different from how I use these tools and actually I don't like the subjective choice of the A pivot.
Nevertheless, thank you for suggesting me this idea and showing it to me on my chart. I am going to watch more videos and see if this kind of analysis fits me.