It seems the rallye is lacking some gas to go further. The model may give an EXIT LONG Signal at the next Opening.
SPX-1D model is available for free in the Indicators and strategy section of TradingView.
Similarities in terms of shape,and also position right bottom a very long moving average.
Depending on the first 3-4 hours of trading on Monday, which should stay in a flat range to conform to the pattern, I might bet on a sudden drop of around 2%.