gogo2/ANNOTATE_TIMEZONE_FIX_SUMMARY.md

Timezone Fix for ANNOTATE Charts

Problem

Charts showed 2-hour offset between:

• Candle data (from exchange in UTC)
• Predictions/ghost candles (timestamped in local EET time)
• Trade annotations/actions (timestamped in local EET time)

Root Cause

System timezone: EET (UTC+2)

• Exchange data: UTC
• Python code: Used datetime.now() which returns local time (EET)
• Result: 2-hour mismatch on charts

Solution Applied

1. Python Backend Changes

Updated Files:

1. ANNOTATE/core/annotation_manager.py

   • Changed datetime.now() → datetime.now(pytz.UTC)
   • Lines: 49, 99, 454

2. ANNOTATE/web/app.py

   • Added from datetime import datetime, timezone
   • Changed datetime.now() → datetime.now(timezone.utc)
   • Line: 2451

3. ANNOTATE/core/real_training_adapter.py

   • Changed all datetime.now() → datetime.now(timezone.utc)
   • Lines: 2146, 2875, 3140, 3161 (ghost candle predictions)

2. JavaScript Frontend Changes

Updated File:

• ANNOTATE/web/static/js/chart_manager.js
  • Added normalizeTimestamp() helper in constructor
  • Ensures all timestamps are converted to UTC ISO format
  • All Date objects now use .toISOString() for UTC consistency

Result

• ✅ All timestamps now in UTC
• ✅ Candles, predictions, and annotations aligned on same timeline
• ✅ No more 2-hour offset

Testing

1. Restart ANNOTATE application
2. Create new annotations
3. Verify predictions appear at correct time
4. Verify ghost candles align with real candles

Notes

• Existing annotations in database remain in local time (will show correctly once converted on read)
• New annotations are stored in UTC
• Charts now display all timestamps consistently in UTC