fix: correct boolean operations and column naming in ThreeATREMAIndicator

src/indicators/three_atr_ema.py

@@ -31,29 +31,25 @@ class ThreeATREMAIndicator:
         # Calculate EMA
         ema = df['close'].ewm(span=self.ema_length, adjust=False).mean()
         
-        # Calculate ATR
+        # Calculate ATR and bands
         atr = self.calculate_atr(df['high'], df['low'], df['close'])
         upper_band = ema + (atr * 3)
         lower_band = ema - (atr * 3)
         
-        # Generate signals based on conditions:
-        # 1. Price is below EMA
-        # 2. Price starts moving up from lower ATR band towards upper ATR band
-        condition = (
-            df['close'] < ema &
-            df['close'].shift(1) <= lower_band &
-            df['close'] > df['close'].shift(1)
+        # Fix signal condition with proper pandas syntax
+        bullish_condition = (
+            (df['close'] < ema) & 
+            (df['close'].shift(1) <= lower_band.shift(1)) & 
+            (df['close'] > df['close'].shift(1))
         )
         
-        results = pd.DataFrame({
+        return pd.DataFrame({
             'ema': ema,
             'upper_band': upper_band,
             'lower_band': lower_band,
-            'signal': condition
+            'bullish_signal': bullish_condition  # Match the column name used in screener
         })
 
-        return results
-
     def get_signals(self, df: pd.DataFrame) -> dict:
         """
         Get the current trading signals based on Three ATR EMA
@@ -73,7 +69,7 @@ class ThreeATREMAIndicator:
                 'ema': current['ema'],
                 'upper_band': current['upper_band'],
                 'lower_band': current['lower_band'],
-                'is_signal': current['signal']
+                'is_signal': current['bullish_signal']
             }
         else:
             return {}