Fletch, what can i say? It is always going to work better to buy at 6 sell at 8 buy back at 7, sell at 9, etc. the problem is that no one can do it consistently although a lot of folks lie about it.
the idea is to pick a bunch of winners and hang on. I don't think its going to work very well to time this, but if you think you can do it, try it
Ihub is incredibly slow right now...I'll try to answer better when it not crawling
edit: but YES if you are going to try to time it PLEASE sell strong rallies, not dips....
position yourself to be able to buy dips, and not have forced sales