Update app.py

app.py

@@ -23,9 +23,14 @@ def get_stock_data(symbol, timeframe):
         period = "60d"
     
     data = ticker.history(period=period, interval=timeframe)
+
+    if data.empty:
+        raise ValueError(f"No data found for symbol '{symbol}' with timeframe '{timeframe}'.")
+    
     return data
 
 
+
 def calculate_indicators(data):
     """Calculates technical indicators."""
     data['SMA20'] = data['Close'].rolling(window=20).mean()  # Simple Moving Average (20 days)