diff --git a/src/strategies/ping_pong_bot.py b/src/strategies/ping_pong_bot.py
index c863ad0..b26525d 100644
--- a/src/strategies/ping_pong_bot.py
+++ b/src/strategies/ping_pong_bot.py
@@ -68,7 +68,7 @@ class DatabaseManager:
 
 class PingPongBot:
     def __init__(self, config_path="config/ping_pong_config.yaml"):
-        self.version = "1.3.2"
+        self.version = "1.3.3"
         with open(config_path, 'r') as f:
             self.config = yaml.safe_load(f)
         
@@ -134,7 +134,16 @@ class PingPongBot:
         hurst_cfg = self.config['hurst']
         mcl = hurst_cfg['period'] / 2
         mcl_2 = int(round(mcl / 2))
-        df['tr'] = df[['high', 'low', 'close']].apply(lambda x: max(x[0]-x[1], abs(x[0]-x[2]), abs(x[1]-x[2])), axis=1)
+        
+        # Vectorized TR calculation
+        df['tr'] = np.maximum(
+            df['high'] - df['low'],
+            np.maximum(
+                abs(df['high'] - df['close'].shift(1)),
+                abs(df['low'] - df['close'].shift(1))
+            )
+        )
+        
         df['ma_mcl'] = self.rma(df['close'], mcl)
         df['atr_mcl'] = self.rma(df['tr'], mcl)
         df['center'] = df['ma_mcl'].shift(mcl_2).fillna(df['ma_mcl'])
@@ -144,9 +153,9 @@ class PingPongBot:
         
         last_row = df.iloc[-1]
         now_str = datetime.now().strftime("%H:%M:%S")
-        self.current_indicators["rsi"] = {"value": last_row['rsi'], "timestamp": now_str}
-        self.current_indicators["hurst_lower"] = {"value": last_row['hurst_lower'], "timestamp": now_str}
-        self.current_indicators["hurst_upper"] = {"value": last_row['hurst_upper'], "timestamp": now_str}
+        self.current_indicators["rsi"] = {"value": float(last_row['rsi']), "timestamp": now_str}
+        self.current_indicators["hurst_lower"] = {"value": float(last_row['hurst_lower']), "timestamp": now_str}
+        self.current_indicators["hurst_upper"] = {"value": float(last_row['hurst_upper']), "timestamp": now_str}
         
         return df
 
@@ -167,7 +176,7 @@ class PingPongBot:
             # 3. Balance
             wallet = self.session.get_wallet_balance(category="linear", accountType="UNIFIED", coin="USDT")
             if wallet['retCode'] == 0:
-                result_list = wallet_response = wallet['result']['list']
+                result_list = wallet['result']['list']
                 if result_list:
                     self.wallet_balance = float(result_list[0].get('totalWalletBalance', 0))
                     if self.wallet_balance == 0:
@@ -271,6 +280,7 @@ class PingPongBot:
                 latest = candles[0]
                 if latest['time'] != self.last_candle_time:
                     df = pd.DataFrame(candles[::-1])
+                    df = df.astype({'open': float, 'high': float, 'low': float, 'close': float, 'volume': float})
                     df = self.calculate_indicators(df)
                     signal = self.check_signals(df)
                     if signal: await self.execute_trade(signal)