From the designer:

“It’s inspired by Luna Lovegood’s scarf in the Order of the Phoenix (I want it sooooo much but I can’t see enough details on the movie stills) and by the one skein scarf in the Happy Hooker.”

chart is on first forum post; chart translation is on page 4 of thread.

Long, skinny scarf patterned after Luna Lovegood’s scarf from the Hog’s Head scene in Harry Potter and the Order of the Phoenix. Pattern is somewhat general and doesn’t specify how many stitches to start out with. You get to decide! This scarf is crocheted “the long way.”

Originally published on craftster here. The Knitting Help version is a bit easier to follow.