What is economic calendar?

Economic calendar is created by economists where they predict different economics figures and values according to previous months. It contains next data: Date — Time — Currency — Data Released — Actual — Forecast — Previous

For example: If the the forecast is better than the previous figure, then US dollar usually is going to strengthen against other currencies.

But when news are due, traders have to check the actual data.

If to look at oil prices, a rising price will result in weakening of currencies for countries which depend on huge oil import, e.g. America , Japan.