In my honest opinion, every stock has its momentums and trends based on sentiment, technicals, and expected news. Some companies take less time for trend reversal than others. But to buy in chunks you have to check where you buying is near reversal time. Obviously, if you buy in every reversal (bottom) with an ascending pattern chart your shares will be golden cause there is way less possibilities of price reaching down your average. For example, I am mid-long term on OPTI and I am buying every time she sets a new strong and consolidated bottom because based on all technicals, fundamentals, and company delivery I know it will go way higher in long term.
All of this changes when you are just day trading, you only care about technically enter and exit.