Trader: add automatic profit calculation (both in relative and absolute values)

[konard]

🤖 AI-Powered Solution

This pull request implements automatic profit calculation for the TraderBot, displaying both absolute and relative profit values as requested in issue #201.

📋 Issue Reference

Fixes #201

🚀 Implementation Details

New Components:

• ProfitCalculationService: Core service for calculating profits using FIFO (First-In-First-Out) methodology
• ProfitAnalysis: Data model containing comprehensive profit metrics
• TradeProfit: Model representing individual completed trades

Key Features:

• Absolute Profit: Displays monetary profit/loss in the trading currency
• Relative Profit: Shows percentage-based profit/loss calculations
• Realized vs Unrealized: Separates completed trades from open positions
• FIFO Matching: Uses industry-standard First-In-First-Out method for trade matching
• Current Market Integration: Calculates unrealized profits using live market prices
• Detailed Trade History: Tracks individual trade profitability and duration

Profit Metrics Displayed:

• Total Absolute Profit (realized + unrealized)
• Total Relative Profit (percentage)
• Realized Absolute Profit from completed trades
• Realized Relative Profit percentage
• Unrealized Absolute Profit from open positions
• Unrealized Relative Profit percentage
• Open position statistics (quantity, average buy price, total invested)
• Recent completed trades with individual profit metrics

Integration Points:

• Integrated into TradingService.SyncLots() method for regular profit updates
• Uses existing operation tracking infrastructure
• Leverages current market price from order book data
• Logs comprehensive profit analysis during bot operation

🧪 Testing

• Comprehensive unit test suite with 6 test scenarios
• Tests cover empty operations, buy-only scenarios, complex FIFO matching
• Validates both profitable and loss scenarios
• Ensures accurate percentage calculations

📊 Usage Example

The bot now automatically logs profit analysis like this:

=== PROFIT ANALYSIS ===
Total Absolute Profit: 245.5000
Total Relative Profit: 12.34%
--- Realized Profit ---
Realized Absolute Profit: 180.0000
Realized Relative Profit: 15.00%
--- Unrealized Profit ---
Unrealized Absolute Profit: 65.5000
Unrealized Relative Profit: 8.76%
--- Position Info ---
Open Position Quantity: 25
Total Invested in Open Positions: 2750.0000
Average Buy Price: 110.0000
Completed Trades: 8
--- Recent Completed Trades ---
Trade: 10 lots @ 100.0000 -> 115.0000, Profit: 150.0000 (15.00%), Period: 45.2min
...
=======================

✅ Test Results

All 6 unit tests pass successfully:

• ✅ Empty operations handling
• ✅ Buy-only operations with unrealized profit
• ✅ Buy and sell operations with realized profit
• ✅ Complex FIFO matching scenarios
• ✅ Profitable trade calculations
• ✅ Loss trade calculations

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This PR was implemented by the AI issue solver