@dbdbdbdb, You really need to wait for point D to be reached before you consider shorting on the basis of a harmonic pattern, other areas of price action also need to be considered and a harmonic pattern should not be traded as a single signal.
@dbdbdbdb, I wont speculate mate just trade what I see, if it reached point D and have other indications of price weakness I would trade it as R/R would be ok. I would be looking for further confirmation at point D though. I am more of a swing trader so 15 min chart is not my thing really. I presume you would have your stop around this mornings high