This is actually a tiny feature, but we've been neglecting updates here on IndieHackers so we're just diving back in with the latest thing we've done. Excerpt from the blog post:
In a recent poll of most annoying things about Beeminder graphs there was a surprise winner. People really want to specify the plot range of their graphs using relative dates. Like always showing just the most recent month of data on the graph. Well, your wish is (sometimes, when we feel like it) our command.