IFFDAY's share grows with the people who rated the film here: n ÷ (n + 10), up to 60% from 15 people, and nothing under 5. The rest is the average of the other platforms, each first converted to a 10-point scale and weighted by how many people rated the film there. For films made in China, Douban weighs less, the more so the earlier China is listed among the production countries. Algorithm iffday-combined-v2.