Systematic Trader

A trading strategy backtester with a React/Next.js frontend and Python FastAPI backend.

Prerequisites

• Python 3.9+
• Node.js 18+
• npm

Quick Start

1. Install Python Dependencies

cd data_api
pip3 install -r requirements.txt

2. Install Frontend Dependencies

cd web
npm install

3. Start the Python API (Terminal 1)

cd data_api
python3 -m uvicorn data_api.main:app --host 0.0.0.0 --port 8000

The API will be available at http://localhost:8000

4. Start the Frontend (Terminal 2)

cd web
npm run dev

The frontend will be available at http://localhost:3000

Usage

1. Open http://localhost:3000 in your browser
2. Select stocks to backtest (e.g., AAPL, GOOGL)
3. Set the date range and initial capital
4. Add trading rules:
   • Simple Rules: Percentage-based triggers (Buy the Dip, Take Profit, etc.)
   • Python Rules: Uses actual trading_rules module (Mean Reversal, Loss/Profit Taker)
5. Click "Run Backtest" to see results

Project Structure

SystematicTrader/
├── data_api/           # Python FastAPI backend
│   ├── data_api/
│   │   ├── main.py           # API endpoints
│   │   ├── backtest_service.py   # Backtesting logic
│   │   └── indicators.py     # Technical indicators
│   └── requirements.txt
├── trading_rules/      # Python trading rule implementations
│   ├── mean_reversal.py
│   ├── early_profit_taker.py
│   ├── early_loss_taker.py
│   └── loss_profit_taker.py
└── web/               # Next.js frontend
    ├── app/
    │   ├── page.tsx
    │   ├── components/
    │   └── api/backtest/
    └── package.json

Available Trading Rules

Simple Rules (Percentage-based)

• Buy the Dip - Buy when price drops by X%
• Buy on Momentum - Buy when price rises by X%
• Take Profit - Sell when position is up by X%
• Stop Loss - Sell when position is down by X%

Python Rules (from trading_rules module)

• Mean Reversal - Buy when short-term average < long-term average
• Early Profit Taker - Sell when profit threshold is reached
• Early Loss Taker - Sell when loss threshold is exceeded
• Loss/Profit Taker - Combined stop-loss and take-profit