Here's a couple of wild-and-crazy ideas using leveraged index ETFs that I recently heard.

1) "If you want to try something fun' when the QQQ ETF is in a tight range on a 1 min chart, place a buy order of both TQQQ and SQQQ (they are inverse ETF's of each other so that when one goes down the other goes up) and place the buy order at the recent top of the range (or swing high). When the market starts heading either down or up you win (because the other buy order never triggers)."

"...The above strategy has not only an extremely high success rate but usually the move typically grosses more than at least half of my other automated trading that does automated trailing stop losses."

No further details, no mention of when to close the trade if it fills. End of day?

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2) Look at a leveraged index as a long-term buy&hold. Yeah, the volatility is scary, buckle your seatbelt.

but...' look at the long-term charts of portfolio backtest. At PORTFOLIO VISUALIZER.

Huge volatility, huge max drawdown. TQQQ lost -79% when QQQ lost -35%. But TQQQ went down from $1,792,400 to $416,391 while QQQ dropped from $98,613 to $67,337. Notice that the bottom of $416,391 (TQQQ) is higher than the top of $98,613 (QQQ).

Might be worthwhile to buy a soupçon of TQQQ and just let it ride.

PV link: portfoliovisualizer.com - Backtest portfolio