My only concern with this now is the time taken from C to D leg. As you would know the A to B and C to D legs should be close to the same time wise.
Some of the best flys I have traded have had this symmetry.
This one is nearly out by a 3 to 1 ratio A to B about 9 to 10 weeks (Sept to Nov 2015)and now C to D about 30 weeks ( Jan to Aug 2016 )
In saying that I've seen two fly's form back to back before , one being on BOQ in the GFC which I've attached ( Exuse the writing on the chart, I was teaching someone this at the time)and I've read about it in the awesome book Trade what you see by Larry Pesavento so we could be seeing this unfold now.
Given we are in the middle of one of the most stupid insane USA election campaigns it's no wonder the DOW has floundered o much in the last 12 weeks on the C to D leg