Going Short Tesla Motors; Chess Moves

I went short TSLA at $206.55, with a protective cover-stop loss over $217. The position is 4% of my trading portfolio. My reasoning behind the trade is under the theory that this momentum darling is operating below a declining 200-day moving average and could easily have just put in a lower swing high before rolling back over. Cheaper oil could also negatively impact the name. But, make no mistake, this is a short-term technical trade rather than a way of expressing a sweeping fundamental thesis. The weekly chart, for example, shows a potential major topping pattern. I suspect many hybrid momentum traders/long-term Tesla bulls are in the name from higher prices and are nowhere close to panicking out of them...yet.