Replace print statements with proper logging for consistent log file output

alpaca_trader/api.py

@@ -95,5 +95,6 @@ class AlpacaClient:
                 return float(status.filled_avg_price)
             return None
         except Exception as e:
-            print(f"Order placement error: {e}")
+            import logging
+            logging.error(f"Order placement error: {e}")
             return None

alpaca_trader/filters.py

@@ -1,9 +1,12 @@
 import pandas as pd
 from datetime import datetime
+import logging
 from .indicators import ema, sma, rsi, adx, atr, bollinger, macd
 from .api import AlpacaClient
 from .utils import EASTERN
 
+logger = logging.getLogger(__name__)
+
 def check_volume(bars: pd.DataFrame, multiplier: float):
     if len(bars) < 20 or "volume" not in bars.columns:
         return True
@@ -84,15 +87,16 @@ def get_vix(client: AlpacaClient, symbol: str, use_vix_filter: bool):
         if len(vix) > 0:
             return vix["close"].iloc[-1]
     except Exception as e:
-        print(f"Warning: VIX data unavailable: {e}")
+        logger.warning(f"VIX data unavailable: {e}")
     try:
         spy = client.get_bars(symbol, "1Day", limit=20)
         if len(spy) >= 20:
             returns = spy["close"].pct_change()
             calculated_vix = returns.std() * (252 ** 0.5) * 100
-            print(f"Using calculated volatility as VIX proxy: {calculated_vix:.1f}")
+            logger.info(f"Using calculated volatility as VIX proxy: {calculated_vix:.1f}")
             return calculated_vix
     except Exception as e:
-        print(f"Warning: Could not calculate volatility: {e}")
+        logger.warning(f"Could not calculate volatility: {e}")
-    print("Warning: VIX data unavailable, skipping VIX filter for this iteration")
+    logger.warning("VIX data unavailable, skipping VIX filter for this iteration")
+    return 0
     return 0