This stock market cycle is 18.5 years. It isn't precise clockwork, but it's about as good as you can get. To help give you a better understanding of the flow of the 18.5-year stock market cycle, take a look at what each letter represents.
2017 was an F year, and 2018 is listed as a G year. But 2019 isn't an H year. Instead, that is out to 2020. And this is where the cycle has some wiggle room on being accurate — there is a year or so in between there that the years can shift.
This year, 2018, will likely see the market panics that play into a larger drawdown, and a rise in volatility. Then the low stock prices will bottom in late 2018 or 2019 before we head toward very high stock prices by 2020 and 2021.