Update app.py

app.py

@@ -15,6 +15,8 @@ def get_stock_signal(symbol: str, interval: str):
     Args:
         symbol: A string representing the stock symbol to analyze (e.g., "AAPL", "GOOG", "MSFT", "TSLA").
         interval: A string representing the time interval between data points (e.g., "1min", "5min", "15min", "60min").
+    Returns:
+        str: A complete sentence summarizing the latest closing price and the recommended trading decision (Buy, Sell, or Hold).
     """
     API_KEY = 'RG9XKRIYBL2EV3V3'