Sell/Buy S&P 500 @ 1880- win

Sell S&P 500 @ 1880 if it stays below & drops further, for 30 minutes expiration

Result: win
S&P 500 stayed below 1880 & dropped from 1880 to 1879.58 at 12:30pm EDT
Stop selling after it broke above 1880 later

Buy S&P 500 @ 1878 (or 1880) if it stays above & goes higher, for 30 minutes expiration

Result: win
Buy @ 1880 as S&P 500 rebounded @ 1880 later