I am looking for
 

Hi my name is Marcelo I am looking for horror movies based on true histories, please I need your help
Thanks

Good movies based on actual events, or just any movies?

Well when you say "true histories" do you mean just loosely based on, or actual fact.

Amityville Horror is based on a "true" story, however whether you believe that the house was really haunted or not is up to you, but a guy really did massacre his whole family there.

Bram Stoker's Dracula is loosely based on Vlad the Impaler, but you could hardly call it a true history due to the fact vampires dont exist! :p

The Exorcist
The Entity
Werewolf Hunter