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Sy HardingSeasonal Timing Strategy - STS
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Sy Harding's STS - "Sell in May" Signals for Dow Chart and S&P 500 Chart
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S&P500 With Sy Harding's STS MACD Applied

More about Sy Harding from his Obituary:Sy L. Harding, 80, died on Tuesday, April 21, 2015 at the Florida Hospital in DeLand, FL, after a sudden illness. Sy was a long-time resident and business owner in both the NH Lakes Region and Central Florida. In the early 1980s he started Street Smart Report, which gave investment advice through newspaper columns and newsletters; he received numerous awards for his timely information. He authored two books on the stock market and was about to release his third. When he was not busy analyzing the stock market, he could be found either on the golf course, in his wood working shop turning out beautiful carved wooden bowls, or supporting his children and grandchildren.

Dow (DJIA) With Sy Harding's MACD 6-Month Daily DOW Chart with STS MACD signal

Buy and Sell Signals:  Sy Harding, applied the Moving Average Convergence Divergence indicator, or MACD, to the Dow after the average best time to leave the market, April 20, following the "sell in May and Go away" strategy.  Likewise, around the best days on average to enter the market, October 16, Harding's STS looks for positive MACD to enter the market again.

For example.  Sy waits for the MACD to turn positive after October 16, the average best day to enter the stock market based on the "Seasons in the Sun Strategy."  Harding writes:
The idea is that if a rally is underway when the October 16 calendar date for seasonal entry arrives, as indicated by the MACD indicator, we will enter at that time. However, if the MACD indicator is on a sell signal when the October 16 calendar date arrives, indicating a market decline is underway, it would not make sense to enter before that decline ends, even though the best average calendar entry date has arrived. Instead, our Seasonal Timing Strategy simply waits to enter until MACD gives its next buy signal, indicating that the decline has ended.
In the Spring, Harding uses the same MACD indicator to look for the favorable exit point from the market any time after April 20, the average best day to exit the market based on the "Seasons in the Sun Strategy." We use the same method to better pinpoint the end of the market’s favorable period in the spring. If MACD is on a sell signal when the calendar exit day of April 20 arrives, we exit at that point. However, if the technical indicator is on a buy signal, indicating the market is in a rally when April 20 arrives, it makes no sense to exit the market just because the calendar date has arrived. So our Seasonal Timing Strategy’s ‘exit rule’ is to simply remain in the market until MACD triggers its next sell signal indicating the rally has ended.

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.

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