Forex News and Fundamental Announcements

Unemployment figures, interest rate changes, CPI figures, Inflation, GDP, etc can cause magnificent swings in the Forex market.
You will notice that the Forex market usually stays flat or narrow range-bound just before a fundamental announcement. That is because it is hard to judge which way the market would move just after the announcements.
Take a look at the trade calendar every morning before you start trading Forex market. The US unemployment figures (NFP) are announced every first Friday of the month at about 8:30am EST and their CPI at about the 13th of the month at 8:30am EST.