Augury
Etymology
From Latin augurium, the work of the augur, a Roman priest who read the will of the gods from signs such as the flight and cries of birds. The deeper root is disputed: it may come from avis, "bird," or from augere, "to increase" (with the augur seeking signs of divine favor for growth). Either way, no important Roman act began without an augury.
noun · /AW-gyuh-ree/
The practice of foretelling the future by interpreting signs, or an omen so read.
What it names
The word for divination from signs — and, more loosely, for any indication taken as a forecast of what is to come.
Example
Analysts pored over the quarterly numbers like priests reading an augury, hunting for any sign of what the market would do next.
Related idea
Portent is a single ominous sign; augury is the broader practice of interpreting signs, and its omens can point to good fortune as readily as to bad.