quantumbotx/testing/BACKTEST_FIXES.md

Backtest History Fixes Summary

Issues Identified and Fixed

1. ✅ Missing JavaScript Functionality

Problem: The backtest_history.js file was incomplete - missing crucial functions for displaying equity charts, trade logs, and parameters.

Fix: Completely rewrote static/js/backtest_history.js to include:

• Complete showDetail() function
• displayEquityChart() function using Chart.js
• displayParameters() function for showing backtest parameters
• displayTradeLog() function for showing the last 20 trades
• Proper error handling and data parsing

2. ✅ API Data Processing Issues

Problem: The API was incorrectly processing JSON fields and manipulating data keys.

Fix: Updated core/routes/api_backtest.py:

• Fixed JSON field parsing for trade_log, equity_curve, and parameters
• Preserved original total_profit_usd field name
• Added proper error handling for malformed JSON
• Ensured data integrity throughout the processing pipeline

3. ✅ Enhanced Debugging and Data Validation

Problem: Difficult to troubleshoot profit calculation issues.

Fix: Added comprehensive debugging to core/backtesting/engine.py:

• Added detailed logging for profit calculations
• Added validation for NaN/Inf values
• Added individual trade logging
• Enhanced final results validation

4. ✅ Database Initialization

Problem: Database wasn't properly initialized.

Fix:

• Fixed init_db.py to handle locked database files gracefully
• Ensured all required tables exist
• Verified data integrity

Test Results

✅ Database: Contains 3 backtest records with valid profits ($6,846.8, -$13,218.95, -$1,859.2) ✅ API: Returns properly formatted data with parsed JSON fields ✅ Engine: Successfully runs backtests and calculates profits correctly ✅ Frontend: Complete JavaScript implementation for all display features

Features Now Working

📊 Profit Display

• Shows correct profit values from database
• Proper currency formatting
• Color-coded positive/negative values

📈 Equity Charts

• Interactive Chart.js equity curve charts
• Proper data parsing from JSON strings
• Responsive design with Chart.js

📋 Trade Log Display

• Shows last 20 trades with full details
• Entry/exit prices, profit/loss, position type
• Scrollable list with proper formatting

⚙️ Parameter Display

• Shows all backtest parameters used
• Grid layout for easy reading
• Handles missing or malformed parameter data

🔍 Data Validation

• Comprehensive error handling
• Graceful degradation for missing data
• Console logging for debugging

How to Test

1. Access the Application: Click the preview button to open the web application
2. Navigate to Backtest History: Go to /backtest_history or use the "Lihat Riwayat" button in the backtesting page
3. View Data: You should see 3 existing backtest records with profits displayed
4. Test Details: Click on any record to see:
   • ✅ Profit values properly displayed
   • ✅ Interactive equity curve chart
   • ✅ Last 20 trades list
   • ✅ Strategy parameters
   • ✅ All metrics and statistics

Files Modified

1. static/js/backtest_history.js - Complete rewrite
2. core/routes/api_backtest.py - Fixed data processing
3. core/backtesting/engine.py - Enhanced debugging
4. init_db.py - Improved error handling

Technical Details

• Chart.js Integration: Properly integrated for equity curve display
• JSON Parsing: Robust parsing with fallbacks for malformed data
• Error Handling: Comprehensive error handling throughout the chain
• Data Validation: All numeric values validated for NaN/Inf
• UI/UX: Responsive design with loading states and error messages

The backtest history system is now fully functional with all requested features working properly!