Every major top ended with the parabolic, a vertical unsustainable spike, delivered on an exhaustion gap.
Overlay from Aug > September fits perfectly... expect a gap weds or thurs to terminate in blowoff around 4200.
RSI went to 88 on 2 September. Closed at 77 Tues... still room to run higher into overbought zone IMO.
Trade at your own risk; GLTA!