fix a bit time logic and refresh of the graph

components/charts/utils.py

@@ -9,6 +9,7 @@ import pandas as pd
 from datetime import datetime, timezone
 from typing import List, Dict, Any, Optional, Union
 from decimal import Decimal
+from tzlocal import get_localzone
 
 from utils.logger import get_logger
 
@@ -114,10 +115,21 @@ def prepare_chart_data(candles: List[Dict[str, Any]]) -> pd.DataFrame:
         # Convert to DataFrame
         df = pd.DataFrame(candles)
         
-        # Ensure timestamp is datetime
+        # Ensure timestamp is datetime and localized to system time
         if 'timestamp' in df.columns:
             df['timestamp'] = pd.to_datetime(df['timestamp'])
-        
+            local_tz = get_localzone()
+            
+            # Check if the timestamps are already timezone-aware
+            if df['timestamp'].dt.tz is not None:
+                # If they are, just convert to the local timezone
+                df['timestamp'] = df['timestamp'].dt.tz_convert(local_tz)
+                logger.debug(f"Converted timezone-aware timestamps to local timezone: {local_tz}")
+            else:
+                # If they are naive, localize to UTC first, then convert
+                df['timestamp'] = df['timestamp'].dt.tz_localize('UTC').dt.tz_convert(local_tz)
+                logger.debug(f"Localized naive timestamps to UTC and converted to local timezone: {local_tz}")
+
         # Convert OHLCV columns to numeric
         numeric_columns = ['open', 'high', 'low', 'close']
         if 'volume' in df.columns: