The barometer reads changes in the air before they arrive, so it stands for sensitivity to shifting moods. Tradition sees it as intuition picking up on change.
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.