Central bank
Institution that sets a country's monetary policy. Fed (US), ECB (Euro), BoE (UK), BoJ (Japan), RBA (Australia).
Central bank communications are forex-defining events. Minutes, speeches, and projections can move pairs more than rate decisions. Pay attention to governor tone - hawkish vs dovish language moves markets before any actual rate change.
Learn to actually use Central bank.
Definitions are the easy part. The free first five modules put this on a real chart and make you do the work. No card required.