[read] the tea leaves

to be able to say or estimate what is about to happen in the future

Hanan made a fortune out of reading the tea leaves and other nonsensical stuff like that.
The fashion designer carefully observed runway shows, attempting to read the tea leaves of the industry and stay ahead of emerging trends.
In the meeting, the CEO hinted at upcoming changes, and employees are now reading the tea leaves to understand the direction the company might take.
My friend keeps dropping hints about a surprise, and I'm here reading the tea leaves, attempting to guess what it could be.
She left a cryptic message in her text, and now I'm stuck reading the tea leaves, trying to decipher what she really meant.