Sy Harding's Seasons in the Sun (STS) recap:
In a nutshell. STS looks for daily MACD to give signals on or after the average best days to enter and leave the market using the seasonal strategy.
The average best day to exit the market is April 20
The average best day to enter the market is October 16
IF MACD is negative on April 20, then you exit the market that day. If MACD is positive, then you wait for it to turn negative to exit the market.
Likewise, if MACD is positive on October 16, then you enter the market on that day. If MACD is negative, then you wait for it to turn positive to enter the market.
Here's the chart...
The buy signal was here, around 950-ish on the SP500.