that can't be right. MILD is a technique that makes you lucid at will. Other then noticing a dream sign, it also makes you automaticaly lucid , because your prospective memory remembered your intention to become lucid and made you lucid. This concept is not related to the strangeness of the dream, or the awareness or dream sign. It just spontaneously happens for no obvious reason. That's why it's a method for having lucid dreams on demand when you become skilled at it. It can't be on demand if you rely on dreamsigns, because they may not appear.