I wouldn't call myself an expert, but I don't know why you would expect the price to go down. As more seats are sold it will probably go up.
Have you looked at their Norwegian language website? We recently booked OAK-ARN for July and paid ~$250 less per person by booking on the Norwegian site ($850 instead of $1100 on the US site) for the exact same flights.
te1 Welcome to FT and your a 1 Post Wonder. Would have never thought.. $497 on US site. $377 on .no with NOK. My son is a happy camper. Thank you, you are my expert.
Thanks and Safe Travels