Hey, maybe not the right place to ask, but what is the logic...

Hey, maybe not the right place to ask, but what is the logic behind this.. I mean, I can easily see how you've come to it, but it seems to me it is quite arbitrary; you've arbitrarily chosen different places to start and end your downtrend line, and what's the science behind the idea that you could shoot the line off horizontally and the price would be facing difficulty above that, all just based on geometry? I'm sure the same geometry did not predict the big spike we've seen, so I'm not sure why it could predict anything else related to it either.. Not having a go at TA at all, this just seems strange. Happy to be filled in on the info I'm missing