A perfect analogy doesn't teach anything.

The problem with these methods is numbers don't come attached and any one of a million things can change the trajectory. Given sameness, the expected path is like late 2013. Given differences, modifications can result. It could flash crash for 3 minutes like ETH did last June when it went to 10 cents, then return back to normal levels.

The efficient causes aren't linked to astrological events. You can hope to use the astrology as a sort of pattern analysis to detect sameness. It works sometimes due to the fact that life is non-random. It fails when emergent properties come forth.