Subject: Re: Wild-and-crazy idea
"What about something simple. Using a weekly chart compare the close of QQQ to its 52-wk moving average. If the close is above the MA use TQQQ; if it closes below then exit."

Interesting premise, but surprisingly not as good as a buy and hold of TQQQ, according to Portfolio Visualizer (since 2011):

https://www.portfoliovisualize...

Just not sure I'd be able to handle that buy and hold drawdown of TQQQ.