Fridays: Fridays are very unpredictable. This is a good day to trade if you want to lose all the profit you made during the rest of the week.

Sundays: There is very little movement on these days. Trade this day if you want to start off your week with NEGATIVE pips.

Holidays: Banks are closed which means very little volume for whatever country is having the holiday. Holidays are great to trade when you would rather lose your money than take a day off and enjoy the other finer things in life.

News Reports: No one really knows where the price will go when a news report comes out. You could lose a fortune trading during news releases if you don't know what you're doing. Price acts like a drunken monkey during these times and become unpredictable.