Buy Apple @ 555, Buy Amazon @ 390, Buy Walmart @ 38.5, Buy S&P 500 @ 1803, Sell S&P 500 @ 1808, 1810 or 1813

Buy Apple @ 555 possible support if it stays above & go higher
Buy Amazon @ 390 possible support if it stays above & go higher
Buy Walmart @ 38.5 possible support if it stays above & go higher
Buying Walmart will be riskier as 38.5 is slightly broken

Buy S&P 500 @ 1803 or slightly higher as it targets 1808 again & might break above it later
Sell S&P 500 @ 1808, 1810 or 1813 if it stays below & drops
Risks: 1808 & 1810 are temporary resistances & can be broken anytime

All for 30 minutes expiration
Buy as low as possible & sell as high as possible to increase your chances of winning