Ok, I'm going to save you a LOT of time.
Mystery and Matador talk a lot about IOI's, stuff of that nature in their book, but in reality, you just NEED TO APPROACH.
You're overanalyzing it, fact is this, different women have different behavior. Some girls are more overt than others, etc etc.
That really isn't a reason not to approach. Approach a girl because you find her attractive, you don't a reason other than that. Excercise the alpha male inside you and take authority.
If you watch Mystery and Matador game, they never look for IOI's, they just go for the kill.
-Kevin