There are a lot of these. Nowadays, gamma flows are discussed a lot in public spaces. Ignoring most of the topic, combining options expiry dates with typical fund rebalancing dates is simple. (Buy in the last week of the month, basically.)
Historically, April, July, November are the best, while January, June and September are the worst. "Sell in may" and go away used to be a common phrase too.
But if you are purely DCAing, such points don't make much sense. Following the interest rate cycle or business cycle is straight forward, or cycles in your own industry. Oil, shipping and microprocessor companies for example forecast years out when their profitable and unprofitable periods will be, so you can move your capital in and out for much higher performance.
Historically, April, July, November are the best, while January, June and September are the worst. "Sell in may" and go away used to be a common phrase too.
But if you are purely DCAing, such points don't make much sense. Following the interest rate cycle or business cycle is straight forward, or cycles in your own industry. Oil, shipping and microprocessor companies for example forecast years out when their profitable and unprofitable periods will be, so you can move your capital in and out for much higher performance.