To dream that you are standing on a ledge means that you are overly anxious, easily agitated, or excited. Note which direction you were gazing. Up? Down? Straight ahead? From your sides? The direction is important as it relates to your personal viewpoint - positive, negative, realistic, or reasonable. Fortunately, this dream may signify a sense of freedom and liberation.
To dream that someone is standing on a ledge might be a call for your assistance and guidance, or desperation.