diff --git a/services/ml/features/talib_features.py b/services/ml/features/talib_features.py
index be77017..37949a4 100644
--- a/services/ml/features/talib_features.py
+++ b/services/ml/features/talib_features.py
@@ -187,6 +187,8 @@ def _call_talib_function(
             return func(high_prices, low_prices, close_prices, volume, **params)
         elif name == 'MFI':
             return func(high_prices, low_prices, close_prices, volume, **params)
+        # Fallback return for volume indicators if no matching case
+        return np.array([])
     elif name in hl_indicators:
         return func(high_prices, low_prices, **params)
     else: