I'll be honest - for session there were just minor signs of weakness and if you included safe haven analysis then the conclusion at NYSE session close would have been to hold longs.

SPX broke 2HR1 fractionally, though SPY "looked like" rejection from 2HR1 / SepR1 combo.
NYA looked like mild pause from Q3R2.

These were about the only real points of weakness. QQQ has been lagging as mentioned in latest Total market view and likely first USA main index to break its monthly pivot on any further market declines. But for Thursday session, the level held.

Safe havens in particular were very weak. VIX in 9s; XIV close above a quarterly level that could have rejected but didn't; TLT YP rejection; GLD SepP break.

It is times like these that a pivotally minded hedge fund could be hitting the NQ, and significantly reducing risk exposure with minimal cost to do so.

SPY, SPX, NQ, TLT, VIX and XIV below.