Alright so this time along with your signal, your Sharingan will evolve as well.

Low Signal--> 2 Tomoe
Medium Signal--> 3 Tomoe
Full Signal--> Mangekyou Sharingan
Enjoy! ^___^

PS: If Want to have a special Icon Up there.. Feel free to make your request,
Follow me on Twitter! @ambarsue|--> Youtube/a1s1pinky.