This year is a mid term election year which happens every 4yrs. Seasonality shows that the markets react bearish on average during these years as compared to other years.
Marked on this chart is the last 3 years seasonality in white shade and last 3 mid term election year cycles marked in green shade.

The shaded areas show the average date range that showed an uptrend (profit).
The idea is to buy at beginning of the shaded area and sell at the end of that shaded area.

IMO we will either go by the last 3yr seasonality average (white) or go by the last 3 mid term election year average (green).

Looking at the 2 shaded green areas (mid term average dates) in Feb-march if you bought at beginning and sold at end of shaded area you would have profit.

The only caveat is that it shows the DAY to buy or sell but not the time. Perhaps using your favorite indicators may help narrowing down the time aspect.

This is my idea for you to ponder and not financial advice.