Your journal should be placed in your Trading Plan.  Traders tend to keep journals to improve their future performance - you need to learn from your mistakes.  You'll have all the transaction data from your broker, but this info won't record why you took that position in the first place and what your emotional state was before you opened your position, or while the position was open.  You need to record your gut feeling about a trade.  If your system signals "buy", your head may say "don't buy".  Remember discipline?  You should trust your signals, but over time you may want to change or tweak your system on the back of your journal records.

Over time your journal should grow, alerting you to the important lessons you've learned on your journey.  It should record everything you do and feel before, during and after a trade.  For instance, what news releases to avoid or trade and do you need to risk more or less per trade?

below I've highlighted some of the things that should be recorded in a journal, so you can learn from each trade:

Now that you've started your journal, you should review it periodically and learn from it to improve your future trading. What to look out for?

Your journal should be reviewed as often as possible, especially with new systems that have just gone live.  After a period of time you may review it on a quarterly basis, or so.  When doing so make sure you learn from it and change your system and trading plan if it's needed.  

Make sure you keep your journal up to date with everything, so make time every trading day in real-time to update it.  You'll thank yourself at a later date when you find that you've inadvertently been trading a currency pair that has consistently lost you money, or you've not been adhering to your system as often as you think. 

Your journal should be placed in your Trading Plan.  Traders tend to keep journals to improve their future performance - you need to learn from your mistakes.  You'll have all the transaction data from your broker, but this info won't record why you took that position in the first place and what your emotional state was before you opened your position, or while the position was open.  You need to record your gut feeling about a trade.  If your system signals "buy", your head may say "don't buy".  Remember discipline?  You should trust your signals, but over time you may want to change or tweak your system on the back of your journal records.

Over time your journal should grow, alerting you to the important lessons you've learned on your journey.  It should record everything you do and feel before, during and after a trade.  For instance, what news releases to avoid or trade and do you need to risk more or less per trade?

below I've highlighted some of the things that should be recorded in a journal, so you can learn from each trade:

Now that you've started your journal, you should review it periodically and learn from it to improve your future trading. What to look out for?

Your journal should be reviewed as often as possible, especially with new systems that have just gone live.  After a period of time you may review it on a quarterly basis, or so.  When doing so make sure you learn from it and change your system and trading plan if it's needed.  

Make sure you keep your journal up to date with everything, so make time every trading day in real-time to update it.  You'll thank yourself at a later date when you find that you've inadvertently been trading a currency pair that has consistently lost you money, or you've not been adhering to your system as often as you think.