As per usual I am watching SPX quite a bit here recently.
Yesterday I bought some SPXL on a move up and closed it today. Price action at the open was very strong and it may be difficult to see but I have "CALLS ABOVE 3948" so I have some lotto sized calls going into tomorrow. I also took this opportunity to get into some longer term short positions and will get full size if we see 3900-3920 tomorrow.
Ultimately, 3948-3950 is a key level. Below that is 3838 which I have been watching for literally months.
Watch the bap fill at around 3870, then a push into that 3900 level tomorrow.