Update app.py

app.py

@@ -167,4 +167,4 @@ if st.button('Train Models'):
         # Create MC Simulation
         mean_return = np.mean(next_point_forecasts)
         std_dev = np.std(next_point_forecasts)
-        plot_monte_carlo_forecasts(data=data, n_futures=n_futures, n_samples=n_samples, mean_return, std_dev)
+        plot_monte_carlo_forecasts(data=data, n_futures=n_futures, n_samples=n_samples, mean_return=mean_return, std_dev=std_dev)