Precisely because it's a roller coaster ride, I think the only reasonable thing to do is to buy the securities you like whenever you have the money.Well, I don't think I'm buying the wrong companies, I'm worried of playing this roller-coaster situation the right way.
I think it's a losing battle to try waiting for perfect entry points. Instead I would put the effort into your securities selection and portfolio construction, and then either buy immediately, OR pre set your entry points (fixed schedule) and blindly buy on a schedule.
I can't see how trying to time your entries is worth the effort. For example, a few minutes ago, the Federal Reserve announced they will now be manipulating the corporate bond market in a new way. BMO jumped on the news. How can you possibly predict such a thing?