Well before you went all crazy about this, this AB=CD isn't your regular harmonic pattern. I have this trading strategy that I said it's an assume but not assume technique.
First, we assume the equal distance retracement happens, which lag of better word I use AB=CD. The part that we don't assume is that we can't short it from C as the formation isn't complete.
The nice thing about this formation is that it lands on the demand zone within the buy zone. I'll treat it as a support and resistance trade and I've already long the pair with tight stop.