Drop from 8-10 AM, then rebound in the European session from 3-4 PM, so you can go long. Usually, you can open a small position near noon; the rebound continues from late night into the morning, so in the morning, go short. After 4-6 PM, it will retest support levels, and before the US market closes, take profits. This has been the short-term rhythm every day recently. From 21:30-23:59, only do ultra-short-term trades during the first half of the night. From 24-4 AM, during Asia's late-night sleep time, do not trade.