The three-pronged trident belongs to sea gods and to Shiva, and stands for command over deep forces. It is read as mastery of emotion, or as power that can both create and break apart.
Does the traditional reading fit your dream, or did it mean something else to you?
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.