A month has passed, and the July candle didn't change the SELL signal of this indicator from the previous month.
I did make some minor changes to the MACD values, which provided a slightly better buy signal at the market bottoms.
I intend to update this algorithm (which I call TATS1) at the beginning of every month. If the markets rise enough to remove the SELL signal, I'll update you here.
Lastly, I am considering programming a custom indicator here on Trading View that will automatically show when to buy and sell.