Update app.py

app.py

@@ -781,6 +781,8 @@ with tab3:
             ax2.set_ylabel(plot_var2, color = color) 
             ax2.plot(graph_data['Date'], graph_data[plot_var2], color = color) 
             ax2.tick_params(axis ='y', labelcolor = color)
+            
+            fig.legend(loc="upper right")
              
             buf = BytesIO()
             fig.savefig(buf, format="png")
@@ -803,6 +805,8 @@ with tab3:
             ax2.set_ylabel(plot_var3, color = color) 
             ax2.plot(graph_data['Date'], graph_data[plot_var3], color = color) 
             ax2.tick_params(axis ='y', labelcolor = color)
+            
+            fig.legend(loc="upper right")
              
             buf = BytesIO()
             fig.savefig(buf, format="png")