BIN chart, page-680

Each to their own but after a while of playing the long game, it becomes clear that averaging up is inherently less risky than averaging down. Even better is the fact that averaging up becomes more favourable to opening a new position on a new oppurtunity that you may end up having to average down on.

Of course, when your portfolio is not diversified then opening new positions on new sector oppurtunities is much preferable.

Plenty of ways to play this game, not one is necessarily better than the other. One does what works for them over the years...