Of course, you can draw lines however you like, but I find it a bit less realistic and predictive if you start from the extreme top, because the top was such an extreme (not conceding blow off top yet, except as a short term blow off top... which was about a two months time period that arguably provided the base for that), so perhaps, instead the top of the resistance line might start from the $15k territory or so and therefore end up touching more of the subsequent BTC price peaks (early march and early may, for example)?