Stocks move in three directions, up, down and sideways and what goes up must come down. So it is with the S&P 500.
$UVXY on the other hand is worth looking at a little differently.
The direction of this ETF in relation to the ETF $SPY can make you a lot of money if you're using sensory acuity!
Pay close attention to the trend and have a plan. Patterns repeat as do cycles. Understand why you are trading and make sure you are trading appropriate to the trend at hand!