Yes, excellent point. QQQ managed to pull off a stick-save into the close today to finish the session just above the key 136.40 level. I think that may have been the result of XLK (tech ETF) making the first tag of the bottom of the channel (uptrend line) on the daily chart. Reactions on the initial tag of a support level (initial as in the first time in a while) almost always produce a reaction.
As you say, best to see that 136.40 get taken out with conviction but from my analysis on not just QQQ but SPY along with nearly all of the sectors within the SPX, I think the odds for at least another 4% or so downside in the coming weeks is very good.

Yes, a backtest of the neckline on that QQQ H&S is certainly a possibility tomorrow, especially after that late-day bounce into the close today. If so, that would be an objective level to add short exposure although the higher-probability entry would be to wait for another 60 or 120-minute candlestick close below the 136.40 level or even better, below today’s lows, even if that comes on a big gap down tomorrow.