The 3 days green?

This statistic is for fun: Condition to screen SPX had a day down then up from 1-1.5% the next day (like yesterday) then up more than 2.5% (may be like today). Buy at close today (collum 3) and to see the next day (collum 4). The screening data from Jan 02 1950. We can see the 8/11 is the positive.