Obsidian is a provider of an online digital currency exchange that offers trade automation and advanced trading options like stop-limit and iceberg trades. It aims to make finance and markets accessible to enthusiasts without the barriers of Wall Street, while also providing familiar tools for serious traders to enter the digital currency market. Obsidian's software enables users to experience finance and markets in a user-friendly way, and it serves as a powerful knowledge base for managing plain text Markdown files.