As I see it four possible levels with the use of moving averages, trend lines and fib levels.
First level is at ~17900, next level is between 17558 and 17460, next level is at ~16468 and next level is ~15476. It possibly might go lower if September rate hike is announced.
Good luck.
In any case, with the current strong momentum after a coiling of the price, I see room for most likely case of the second nearest level and strong 200 day MA.