Some people might be waiting for it to go over 900 to get some profits out.
No, that's not the way it works. If you want to take profits at $900, you sell right before it since the risk of bouncing off the wall is high. Nobody waits for $901 to sell (well, idiots probably do but they dont last long), after the resistance is broken the price goes up, makes sense to sell right before the next resistance.