In my experience, the trading day for most markets (EURUSD included) can be divided into the following time frames:
* The first two hours of the day - The first two hours that your market is open, or the first two hours of regular trading if your market is open twenty-four hours per day. This is usually the time of day that has the most trading activity, and for this reason, many professional traders only trade during the first two hours of the day.
* The rest of the morning - The remaining hours until lunch time.
* Lunch Time - This is usually the time of day that has the least trading activity, but that doesn't necessarily mean that it shouldn't be traded.
* The first two hours of the afternoon - The first two hours of the afternoon session can be as active as the first two hours of the morning session. In addition, the first two hours of the European afternoon session include the US open and part of the US morning session, so the additional trading activity can make this a very actively traded time of day.
* The rest of the afternoon - The remaining hours until your market closes, or until the end of regular trading if your market is open twenty-four hours per day.
Knowing when to trade is as important as knowing how to trade. By keeping track of the results of your trading system during each of the above time frames, you will be able to determine when it is most profitable. You may even find that you only need to trade for a couple of hours each day, and can spend the rest of the day doing something else that you enjoy.
Adam Milton