I wrote something new up two nights ago that goes along with the average to test out, and that's likely what you're seeing. It's just testing a few days to see what happens to try and stabilize things before it gets out of control. Basically APR is reduced if the price is below a certain point, stays at 21% in the green zone, and is increased if it's above a certain point. I haven't had a chance to write a post.
Without this, printing would get out of control and my plan to buy up the extras over the next few weeks would go up in smoke.
okay thanks for the feedback, looking forward to the post/updates