Standing on a ledge is read as being at the edge of a situation, with a strong awareness of risk. It stands for a precarious position and the need for steady footing.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.