Signature Signings go out of packs at 6pm on Tuesday. They only went into packs on Friday, and since have been required for 3 popular SBCs (Benzema, Gelson, Chiellini). These SBCs are still available for a few more days, though, and I think the combined cut in supply with continued demand could cause them to rise.
Signature Signings: PS4 30k XBOX 28k PC 30k (3-5k profit target)
Look to sell later next week before TOTGS is released (Friday, December 3rd).