The ornamental design for a mid-point indicator lace, as shown and described.
FIG. 1 is a perspective view of a mid-point indicator lace showing our new invention;
FIG. 2 is an enlarged front view thereof, wherein a rear view is a mirror image;
FIG. 3 is a left-side view of FIG. 1, wherein a right-side view is a mirror image; and,
FIG. 4 is a top view of thereof, wherein a bottom view is a mirror image.
The break lines indicate that the appearance of any portion of the mid-point indicator lace between the break lines forms no part of the claimed design.