rexcare/stock-exchange

Stock Exchange

This is a very simplified implementation of how a stock exchange works. I have no financial background, so I'm open to suggestions on logic used, variable/class names. Feel free to point out any mistakes.

I started out just to try out a TypeScript project and implemented the core logic which is now contained in the @se/core package (yes, this is a monorepo).

@se/core

@se/core has the logic for order matching, placing orders, orders getting confirmed, keping track of orders of users, orderbook of a symbol and so on.

Check the tests folder for usage instructions.

@se/api

@se/api uses the core library and provides the API which is used by the @se/ui for fetching data. This is build on Express.js and Socket.io.

Check the docs folder for the postman collection.

@se/ui

This is created on React with Socket.io for sockets, Material-UI for UI components and Lightweight Charts by TradingView for charting.

Check the GitPod link for a working demo.

What's in Scope

• Order matching
• Order placing
• Tracking users' orders, holdings and funds
• Charting prices

What's not in Scope

• Clearing house?

  This list is incomplete.

Repository highlights

• Monorepo (using lerna with yarn; couldn't get it working with yarn workspaces because of a dependency issue; VS Code was not liking yarn2)
• Precommit hooks (husky -> lint-staged, commitlint)
• Conventional Commits
• Extensive testing(unit tests, code coverage ^80%)

Get Started

yarn install
yarn run build-watch
yarn start

Open this in Postman for APIs

To-do

• Persistence
• Different types of orders (Limit and Market are supported as of now; support for Stop loss, Cover Orders, Bracket Orders)
• Cancelling orders
• Roles (Traders, Admins)
• Leverage
• Trading hours
• Pre-market trading
• Automatic square-off
• Tick Size
• Circuit Breakers