Missing a chance in a dream — a train pulling away, a door closing — is read as regret or fear of letting something slip. It asks what you still want to reach for.
When this appeared in your dream, what were you feeling?
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.