1) Oct 3rd the S&P breaks over the 50 sma,
System says go long in the $UPRO.
2) October 6th at the close the S&P breaks below the 50 sma at around 3750. System says sell $UPRO Buy $SPXU.
3) Today the S&P breaks over the 50 sma at 3600. System says to Sell $SPXU and go into $UPRO.
When the market is bullish off his system you long $UPRO 3x leveraged and when the system goes bearish aka 50 sma is breaks you long $SPXU aka an inverse. Quite simple system to learn but pretty effective. Hopefully that helped but probably not the most detailed explanation.