Anchors are links on websites that when clicked will take the user to another part of a screen. We know that buttons and link indicators take users to other pages or makes certain actions happen. But what would be the most suitable visual indicator to tell the user that this is an anchor?
Consider using a smooth scrolling animation for anchor links, rather than a graphical element as an indicator that the link is connected to something on the same page.
Smooth scrolling maintains the understanding the user is staying on the page (See this Smashing Magazine article on smart transitions).
While an arrow pointing to the upper right in a box has become standard for "new window" or "new site", a downward pointing arrow has become standard for "download", so a visual icon/element similar to that may create confusion. Additionally, any anchor or chain link type iconography might not be distinct enough for your users to understand their meaning.