Standing on a rooftop is read as a wider view and a sense of rising above the everyday. It can also stand for freedom with a hint of risk, or for being on the edge.
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.