# Marketplace The Finmars Marketplace is like a little app store for our system. Here’s how it works: 1. ****Packages and Modules**** - A ****package**** is a folder that holds one or more ****modules****. - Each ****module**** is a `.zip` file. 2. ****What’s inside a module?**** - A `.json` file with settings and info. - A `.py` file with the code that makes new features work. - A `.html` file with any pages or screens the feature needs. 3. ****Installing a module**** - The user uploads or picks a module from the Marketplace. - The system unzips it and reads the `.json` to know what to do. - Then it loads the `.py` code so new tools appear in the app. - Finally, it shows any new pages from the `.html` file. 4. ****How it extends the system**** - Each module adds its own menu items, buttons, or pages. - Modules can talk to existing parts of Finmars, so they all work together. - If you don’t need a feature anymore, you can uninstall its module, and it goes away cleanly. With this setup, anyone can build small add-ons (modules) to make Finmars do new things—fast and safe.