Horizontal Scroll Marker

Inspired by @Isil Uzum 's Scroll Marker Idea https://dribbble.com/shots/2479061-Scroll-Marker-Idea
Love it!
So as you can see, I made a horizontal version, the horizontal content layout is quite simple and clear for layout structure design, but the pain point for the layout is, users won't scroll to the end usually, and the last card has very little click rate, in order to fix that, I thought it will be good to add a hidden scroll bar, let user have a clear view of where he is right now, it's not a new thing actually, it's very common use in photography website, but I didn't see a lot in mobile UI.
Let me know what you think, feedbacks are always helpful : )