Signposts are something that allow you to have a way for your mind to measure. Signature is the positive side of the not-self theme of any Type. In The Signature Question, Ra explains the signposts for each of the Signatures of the four aura Types.

One of the very few promises of Human Design is that if you follow your Strategy and Authority, it begins the process of reducing resistance. As you begin to operate correctly in your process, to move away from the not-self theme and toward the signpost of your Signature.