The longest finger stands in the centre of the hand and is traditionally linked to balance and responsibility. Shown as a rude gesture, it is read as anger or defiance that has not been said aloud.
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.