Trader Bot: Sell on market price if maximum loss passed

[konard]

🎯 Issue Reference

Fixes #225

📋 Summary

This PR implements maximum loss protection for the TraderBot by automatically selling all positions at market price when the loss exceeds a configurable threshold.

🚀 Changes Made

Core Features

• MaximumLossPercentage Setting: Added optional configuration parameter to set the maximum allowable loss percentage
• Loss Calculation Logic: Implemented real-time loss calculation based on average purchase price vs current market price
• Market Sell Orders: Added functionality to place immediate market sell orders (not limit orders)
• Automatic Protection: Integrated maximum loss protection into the main trading loop with highest priority

Technical Implementation

• TradingSettings.cs: Added MaximumLossPercentage property (optional, nullable decimal)
• TradingService.cs:
  • Added CalculateCurrentLossPercentage() method to compute real-time portfolio loss
  • Added ShouldTriggerMaximumLossProtection() method for threshold checking
  • Added PlaceMarketSellOrder() method for immediate market execution
  • Integrated protection logic at the beginning of the trading loop (highest priority)
  • Added comprehensive logging with LogCritical for maximum loss events

Configuration Examples

• Updated appsettings.TMON.json and appsettings.TRUR.json with MaximumLossPercentage: 10.0 (10% loss threshold)

🔧 How It Works

1. Real-time Monitoring: On every market data update, the bot calculates current portfolio loss percentage
2. Threshold Check: Compares current loss against the configured MaximumLossPercentage
3. Emergency Action: When threshold is exceeded:
   • Cancels all active buy/sell orders
   • Places market sell order for all owned lots
   • Clears all position tracking
   • Logs critical protection event
4. Immediate Execution: Uses market orders (not limit orders) to ensure immediate execution at current market price

📊 Loss Calculation Formula

Average Purchase Price = Total Cost / Total Lots
Current Portfolio Value = Current Market Price × Total Lots
Loss Percentage = ((Total Cost - Current Value) / Total Cost) × 100

🛡️ Safety Features

• Optional feature (only activates if MaximumLossPercentage is configured)
• Comprehensive logging for all protection events
• Fail-safe design: continues normal operation if setting is not configured
• Priority execution: Loss protection runs before any other trading logic

🎛️ Configuration

Add to your appsettings.json:

{
  "TradingSettings": {
    ...
    "MaximumLossPercentage": 10.0
  }
}

✅ Testing

• ✅ Code compiles successfully
• ✅ No breaking changes to existing functionality
• ✅ Backward compatible (optional feature)
• ✅ Comprehensive error handling

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