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Order Execution Simulator Utility (NO API)

This utility does NOT use any external APIs. All trades and portfolio data are managed locally for learning and experimentation.

This tool lets you simulate buy and sell orders, track a virtual portfolio, and analyze trade performance. All prices are entered manually.

Features

  • Simulate buy and sell orders for any asset (stocks, crypto, etc.)
  • Track cash balance, holdings, and trade history
  • Calculate realized and unrealized P&L
  • Support for market and limit orders (simulated)
  • Save and load your virtual portfolio and trade history
  • CLI interface (Python script)
  • Beginner-friendly: All code is commented for learning

Requirements

  • Python 3.7+
  • No external libraries required (uses only Python standard library)

Setup

  1. Copy order_execution_simulator.py to your desired folder.
  2. Open a terminal in that folder.

Usage Workflow (Step-by-Step)

  1. Run the script: 
    python order_execution_simulator.py
  2. Follow the menu prompts:
  3. Place a buy or sell order (market or limit)
  4. View portfolio and cash balance
  5. View trade history and P&L
  6. Save/load portfolio and trades
  7. Exit when done.

No real market data is used. This is for learning only!

Example Session

Welcome to the Order Execution Simulator!
1. Place order
2. View portfolio
3. View trade history
4. Save
5. Load
6. Exit
Enter your choice: 1
Order type (buy/sell): buy
Asset: TSLA
Quantity: 5
Price: 700
Order executed! Portfolio updated.

Learning Notes

  • No API: All calculations and data are managed in Python, so you can see and modify the logic yourself.
  • How does it work? The code is structured with classes and functions, with comments explaining each step.
  • How can you extend it? Try adding support for commissions, or tracking portfolio value over time!

License

MIT