Would there be anything wrong with buying short ETFs and attaching tight trailing stop losses to them?

So I have been keeping track of the VIX and how it moves. When it goes well below the 50 day moving average I begin to invest in SQQQ and SDOW. I buy them usually on an afternoon then the next morning attach sell trailing stop loss orders of 0.4%, 0.8% and then 1.2%. These are not just short ETFs but they are leveraged. They move quick at times and when we have red days they make me a lot of money. Most of the movement with these happens during non-trading hours.

I about 30% of the time guess wrong and those trailing stop sell orders come in handy then. I'm not aware of any brokerages that allow these short ETFs to be traded during non-trading hours (if anyone knows of any let me know bc that would be a game changer).

Is there otherwise anything wrong with this? Why doesn't everyone all the time do exactly this? This has made me a lot of money and the more I think of it maybe the smart thing to do is buy up the long (leveraged) ETFs like TQQQ and UDOW and attach the 0.4% etc sell trailing stop loss orders. When we have a really positive day like today (Sept. 19, 2024) sure your SQQQ and SDOW will sell off immediately but you will offset those losses and still make bank on the TQQQ and UDOW.