The US stock market is only open for half a day on Christmas Eve this Tuesday, and will be closed for the Christmas holiday on Wednesday. Next Wednesday is New Year's Day, and the market will also be closed. During the last two weeks, the market has had thin trading most of the time, primarily characterized by disorderly fluctuations.
However, there is no need to be particularly pessimistic. This year's trend has basically been set, waiting for the return of President Trump to create new brilliance!