Progress bar for visually indicating information about a corresponding ordered (for example), time ordered list of items (for example, clickable items representing social media posts). Some embodiments of the progress bar may include one, or more, of the following features: (i) different “interest/interaction statuses” corresponding to the list items; (ii) user interaction zones for jumping the displayed list of items to newly-created items and jumping back to a location in the list where the user was before jumping to the newly-created list items; and/or (iii) adjustable “density” progress bar icons that dynamically vary the number of list items corresponding to a single icon depending up the number of list items loaded to a mobile device.