I would offer that you are getting a handle on it, and the assessment of your chart is solid and the support points valid. However, going by your chart from the link. It isn't a pin bar!
It can't be a pin bar until the next bar has formed or nearly formed. Patience is needed. You can't put all that work in and then anticipate and jump the gun.
At the moment all you have is a testing probe to find out what is down there. Are there more buyers than sellers, or is it the other way around, More sellers than buyers. The forming of the next bar will give you another piece of the jigsaw.
Good post. I think pinbars have to reject a certain price level for them to carry most weight with the accompanying buying or selling at that price. They're just a visualization of price rejection at the eod. No doubt this has been said before.