Nexus Stock Trading App This project is a stock trading application named Nexus, built using Flask, a lightweight Python web framework. It allows users to register, log in, buy and sell stocks, view their portfolio, and track their transaction history. The application integrates with a stock quote API to fetch real-time stock prices.

Features User Authentication: Register and log in securely. Buy Stocks: Purchase stocks by entering a stock symbol and the number of shares. Sell Stocks: Sell previously purchased stocks. Portfolio Overview: View the user's portfolio including stock symbols, shares owned, and the current market value. Transaction History: Track all buying and selling activities. Add Cash: Deposit additional cash into the user's account. Real-time Stock Prices: Fetches the latest stock prices using an external API. Custom Filters: Display prices in USD format. Technologies Used Backend: Flask, CS50 SQL Library, SQLite Frontend: Jinja2 templating, HTML, CSS Security: Werkzeug for password hashing Session Management: Flask-Session Installation Prerequisites Python 3.x Flask SQLite CS50 Library for SQL Setup Clone the repository:

sh Copy code git clone https://github.com/yourusername/nexus-stock-trading-app.git cd nexus-stock-trading-app Install dependencies:

sh Copy code pip install -r requirements.txt Set up the database:

sh Copy code flask db init flask db migrate -m "Initial migration" flask db upgrade Run the application:

sh Copy code flask run Access the application: Open your browser and navigate to http://127.0.0.1:5000

Usage Register Navigate to the /register route. Enter a username and password. Confirm the password and submit the form. Login Navigate to the /login route. Enter your username and password. Submit the form to log in. Buy Stocks Navigate to the /buy route. Enter the stock symbol and the number of shares. Submit the form to purchase the stock. Sell Stocks Navigate to the /sell route. Select the stock symbol and enter the number of shares to sell. Submit the form to sell the stock. View Portfolio Navigate to the / route. View your portfolio including stock symbols, shares owned, and the current market value. View Transaction History Navigate to the /history route. View all buying and selling activities. Add Cash Navigate to the /add_cash route. Enter the amount of cash to add. Submit the form to add cash to your account. File Structure arduino Copy code nexus-stock-trading-app/ ├── static/ │ └── styles.css ├── templates/ │ ├── buy.html │ ├── history.html │ ├── index.html │ ├── layout.html │ ├── login.html │ ├── quote.html │ ├── quoted.html │ ├── register.html │ ├── sell.html │ └── add_cash.html ├── .gitignore ├── app.py ├── helpers.py ├── finance.db ├── requirements.txt └── README.md Helper Functions apology: Render an error message. login_required: Decorator to ensure the user is logged in. lookup: Fetch stock data using an external API. usd: Format a value as USD. check: Validate username and password during registration. Contributing Fork the repository. Create a new branch (git checkout -b feature/your-feature-name). Commit your changes (git commit -m 'Add some feature'). Push to the branch (git push origin feature/your-feature-name). Open a pull request. License This project is licensed under the MIT License. See the LICENSE file for more details.

Acknowledgments CS50's Introduction to Computer Science for the foundational project idea. Flask and its community for the amazing framework. The contributors and maintainers of the libraries and tools used in this project.