Legally, no (provided you would be ruled competent to handle your own affairs). However, they also do not have to support you in anyway, shape or form if they so choose. If you are living under their roof and/or they are supporting you in some way, then it would be prudent to pay heed to what they are saying.
At 18 your parents are no longer required to support you in most places. If they are paying for it, they can tell you where to live. Otherwise you could be on your own.
you have to have a parents consent
you have to have parents permisson if you are under 18.
If you are 18 or older. If not you are pregnant minor and still your parents responsiblity and they can tell you what to do.
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.
Legally, once you turn 18 you are considered an adult and are responsible for making your own decisions. While your parents can still offer guidance and advice, they cannot tell you what to do. It is important to communicate openly with them to maintain a healthy relationship.
18...unless you become emancipated.
The states prefer the parents to be at least 18-21.
When you become an adult at age 18.
You're screwed.
In US, you can move out at 18 without consent of your parents. However, if they tell you to stay, it might be worth your while to listen to them-- parents can be a lot of help even after you are 18-- try very very hard to work out some kind of an agreement with them before you move out.
Most parents are expecting you to be able to support yourself after you turn 18 because most likely their parents did the same to them when they turned 18. Therefore they believe it is their "duty" to do the same.