I don't often pay attention to seasonal factors. After all, if we believe markets just 'a random walk' (Burton Malkiel), then every situation or condition is different than the next. However, many traders and investors seek an advantage by using seasonal trends. Since they are all calendar related they are extremely difficult to follow a pattern, even with many data points. But, sometimes they work because our minds choose the easy path, which is always with the herd.
We are coming upon a seasonally strong period for markets. The holiday period is generally a time when the crowd is sanguine about risk and willing to step up and buy stocks even as they are rising higher. That approach is often punished severely especially at times when the market is near all time highs - as it is currently.
Yet, there is something to say about historical evidence here. When the markets are up decisively for the year after 10 months, the record is astounding for the remainder of the year. It is higher, and often much higher. Just saying that gives me shivers, when the dominance of the crowd wins out there is no contrarian stance to make, unless you want to get bulldozed.
I will suggest to you my approach for handling such market conditions: play it safe, cautiously, but follow the lead of the trend. Back in 2018 the markets appeared to be headed much higher. On October 4th the market hit all time highs but only a week later started coming down hard, leading to the massacre in December. The seasonal trend certainly did not happen for the bulls and really was the start of some heady volatility.
What is playing it safe? That would be lighter positions, plenty of cash, some protective puts, eyes and ears wide open, ego checked at the front door. This should help you have a very enjoyable hopefully profitable holiday period.