Stock Portfolio Analyzer 📊

A full-stack stock portfolio tracking and analysis app built with Python (FastAPI) backend and Flutter frontend. Enter your stocks, buy price, and quantity — get a complete portfolio report with trend analysis, volatility, P&L, and SMA indicators.

📱 Screenshots

Single & Multi Stock Input	Analyze Portfolio
Portfolio Overview & P&L	Trend Analysis & Allocation

✨ Features

• Single & Multi-Stock Analysis — Analyze one stock or an entire portfolio at once
• Portfolio Overview — Total invested, current value, overall P&L and P&L percentage
• Per-Stock Metrics — Current price, buy price, quantity, invested amount, current value
• Volatility & Daily Returns — Daily return percentage, average daily return, and volatility score
• 30D High / Low — 52-week range tracking per stock
• Best & Worst Day — Best and worst single-day return with exact dates
• SMA Trend Analysis — SMA20, SMA50, SMA200 with short-term, momentum, and long-term trend labels
• Portfolio Allocation — Visual weight breakdown of each stock in your portfolio
• History — View past analysis results

🛠 Tech Stack

Layer	Technology
Backend	Python, FastAPI, yFinance, Pandas, NumPy
Frontend	Flutter, Dart, Dio, Provider
API	REST (HTTP/JSON)

🚀 Getting Started

Backend

cd backend
pip install -r requirements.txt
uvicorn app:app --reload --host 0.0.0.0 --port 8000

Frontend

cd frontend
flutter pub get
flutter run

Update the baseUrl in lib/services/api_service.dart to your machine's local IP.

📡 API Endpoints

Method	Endpoint	Description
GET	/	Health check
POST	/analyze/single-stock	Analyze a single stock
POST	/analyze/multiple-stock	Analyze multiple stocks
POST	/api/refresh-prices	Refresh live prices

Request Example

POST /analyze/single-stock
{
  "stockname": "RELIANCE.NS",
  "price": 1200.0,
  "quantity": 20
}

📊 Response Fields

• Current Price, Bought Price, Quantity
• Profit Loss, Profit Loss Percentage
• Total Investment Amount, Current Portfolio Value
• Volatility, Daily Returns
• Best Day / Worst Day (date + return %)
• 30D High / 30D Low
• SMA20, SMA50, SMA200
• Short Term, Momentum, Long Term trend labels
• Portfolio Weight (multi-stock only)

📄 License

MIT License — open source and free to use.

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Built with ❤️ using Flutter & Python