Pull The Trigger Meaning

(soccer, idiomatic, intransitive) To shoot, kick the ball in hope of scoring a goal.

Example: To fire a gun.
2003, Marcel Link, High Probability Trading: Take the Steps to Become a Successful Trader, page 377
  Some traders are too afraid to pull the trigger and just watch the market without ever getting involved.
2010 December 28, Kevin Darlin, “West Brom 1 - 3 Blackburn”[1], BBC:
  The Baggies almost hit back instantly when Graham Dorrans broke from midfield and pulled the trigger from 15 yards but Paul Robinson did superbly to tip the Scot's drive around the post.