The lesson new Forex traders should take from this week's news that South Korea will continue to intervene in the exchange rate of its currency by buying that currency and selling US dollars is that sometimes foreign governments give away what amounts to insider information regarding upcoming changes in exchange rates.

The South Korea story is nothing unique.  Most governments, especially in the "developed world," intervene in similar ways to control inflation and other economic phenomenon. 

Where Forex traders can benefit is by keeping a close eye on this kind of news, comparing it to data in their Forex trading system, and setting a sure strategy based on what these governments say they are going to do to influence exchange rates.