The law also says that as a citizen you have a right to make a legal arrest. When you pull your ccw you are in effect attempting to defend yourself or others and or make a citizens arrest and the law says that you can use the amount of force nesessary to effect that arrest up to and including leathal force. And you can defend yourself anywhere you are you don't have a duty to back down you could be walking down the street or in church, in the store, eating dinner at a restaurant it makes not difference in Oklahoma the law does not just apply to your home.
As for sign language I don't think so...if you don't know who the good and bad guys are in a gun fight you have no business jumping in the fight.
I don't claim to be a lawyer or anything like that. However I have to respectfully disagree about pulling your CCW to arrest someone.
Call me crazy but the only time I pull my CCW I will be using to do what it was made for. Not doing a police officers job. I do agree that you have the right to place someone under citizens arrest. But I think pulling your CCW and doing it is asking for trouble.