A few years back, when I first added breadcrumbs to my site, I agonized for days over questions like yours.
I was focused on what Google would think, and how I could set up breadcrumbs to maximize seo benefits. Eventually I understood that ALL I should worry about is the user experience (which, actually, is what Google wants me to focus on, too
). So I settled on the following format...
Link to TIER 1 page > Link to TIER 2 page > Name of TIER 3 page.Some notes on that...
1) The link to the TIER 1 page is always called "Home." That, for me, is the most user-friendly, intuitive thing to call it.
I know you call yours "stock screening 101." I know that Nori calls her "Anguilla." For me, those are both placing Google above humans, so I use "Home."
2) The current page is plain text, never a link. Again, I do that for optimal user experience, because it's the format used on 99% of sites.
3) It's not a bad idea to have a "Top of Page" link for user experience, especially on a long page. But I would keep it separate
from the breadcrumbs (because trying to combine the two is not immediately intuitive).
On this page, for example...[Domain Private]
Nori has a "Top of the Page" link right at the very bottom, which makes sense.Bottom line?
Forget about seo considerations. Put yourself into a visitor's shoes and do what is most intuitive.
When I did that a few years back, my rankings held up just fine.
Hope that helps.
All the best,