If your 18 can your parents tell you you cant move out?

No once you are 18 you are legally an adult. Your parents can't tell you when or when not to move out. It is your decision once you are 18 years of age. Also if your parents call the police on you for running away or any other excuse they come up with the police can not do anything except give you some edvice on how to handle the situation. So the answer to your question is no your parents can not tell you when you can't move out as long as you are the legal age of 18.