Here are 4 tips for today's trading. This will help you decide where you should invest and what to look for:
1. Euro takes a tumble
The European currency took a swift, sharp fall on Friday as the head of the European Central Bank -- Mario Draghi -- said the bank was ready to "do what we must to raise inflation as quickly as possible." The euro fell by about 0.5% versus the U.S. dollar before recovering a bit. It's down by about 5% over the past three months.
Investors are readying themselves for the ECB to print more money or make other policy moves to get inflation back up to about 2%.
Draghi's remarks come against a picture of weak growth and almost zero inflation in the eurozone.
European markets also dipped into the red in early trading but some key indexes have now bounced back.