It could have to do with a golden ratio, if the person assumed that the motion toward the peak at $266 started on Sunday, 7 October 2012, or 186.4 days before.
Then if in his idea the start of the motion toward the latest peak at $1242 started on 23/08/2013, then 115.2 days we would get us the golden ratio 1.61.
So by using length in time and not price, that could give the angle of 137.2 degree.

But that's getting beyond my maths skills, so i'd just say fib time zone/shooting apex/fractal theory applied to btc ?