Rock bottom is when they have nothing left to lose. It's when they have lost their home, friends, family, and above all else self respect. Once they truly hit bottom, they have no place to go but back up. Rock bottom comes near the end of the deep, dark depression and acceptance. Mlcers tend to be tough and hang on to the very end because they are very, very stubborn.
You can read up more or rock bottom by doing a search on google or AA. You hear the term more so with drug addicts and alcoholics when they have nothing left to lose.
Each individual hits bottom differently. He may not hit bottom for a long time, but when he does...you may actually witness it. I wouldn't sit around waiting looking for it to happen. The old saying "a watched pot never boils' is very true of a Mlcer.
Focusing on the stages will not help you. They bounce back and forth in them and in some cases are in several at a time. That's why it's important not to devote your life to focusing on them. They really are bouncing off the walls and you have to be the sane, rational one here and keep your life, family and home together.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.