How can i create a bindable property?

I have Indicadores.xaml and Indicadores.xaml.cs. I have this property

public static string EmailLogado { get; set; }

This property is loaded when i log in the App. This is correct, is working fine. But in my xaml i cannot to bind this property this way

Title = "{Binding EmailLogado}"

I understood that i need become this property in Bindable property, is all right? So how do i do this?