add model

app.py

@@ -59,11 +59,11 @@ class TS:
         fig = go.Figure()
         fig.add_trace(go.Scatter(x= data.ds, 
                                 y=data.y,
-                                name = f"{symbol}_true"
+                                name = f"{self.symbol}_true"
                                 ))
         fig.add_trace(go.Scatter(x= future.ds, 
                                      y=future.yhat,
-                                     name = f"{symbol}_pred"
+                                     name = f"{self.symbol}_pred"
                                     ))
         return fig