QQQ sell signal to come on a break below 595.70 support on this 1-minute chart for either a day trade fade-into-the-close or a swing trade entry or add-on with QQQ & SPY still below the recently broken 60-minute uptrend lines.

QQQ 1m Sept 18th

QQQ 1m Sept 18th

Zooming out to the 60-minute time frame, QQQ offers an objective short entry on an add-on (to a starter short taken on the wedge breakdown) following this backtest & rejection off the recently broken 60-minute uptrend line.

QQQ 60m Sept 18th

QQQ 60m Sept 18th