A weak currency is good for the economy in the countries by other countries to come and invest in the domestic trading the more domestic economic growth and continued to import goods from abroad because they will be able to import goods have been.
Weak currency is good for the local economy by enabling countries to invest more in trade, the economy and good growth in imports from abroad because it can not be imported.
The light is good for the economy in the country by the other countries to invest in business in the country, more make the domestic economy growth and good for the imported goods from overseas because it can import goods.