Update app.py

app.py

@@ -11,14 +11,27 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
-    #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that does nothing yet 
-    Args:
-        arg1: the first argument
-        arg2: the second argument
+def calculate_historical_var(returns, var_level=0.95):
+    """
+    Calculate the Value at Risk (VaR) using the historical method.
+    
+    Parameters:
+    returns (np.array): Array of daily returns.
+    var_level (float): VaR level (e.g., 0.95 for 95%).
+    
+    Returns:
+    float: VaR value.
     """
-    return "What magic will you build ?"
+    # Sort the returns in ascending order
+    sorted_returns = np.sort(returns)
+    
+    # Determine the index for the VaR level
+    index = int((1 - var_level) * len(returns))
+    
+    # Get the VaR value
+    var_value = sorted_returns[index]
+    
+    return var_value
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: