I certainly think you will find it useful. If you are competent with Excel then there are some good spreadsheets to use in this thread which you can modify to suit what you need. There are also links to some other types of journals, too:
free excel trading journal
The main point of the journal is to provide data on whatever you want to quantify. It might just be a record of your P/L and/or trading statistics, but it can be a lot more.
For example, you could add columns such as:
Was trade according to method yes/no
Reason for exit: targit hit, stop hit, manual close, reverse signal, etc
Which trading session: London, NY, Asia
P/L according to: currency pair, commodities, indices, etc
For example, Some years back I used to close a lot of my trades manually according to how price movements were evolving. But then I carried out an experiment and monitored all those trades to see if they would have hit my target if I had not manually “interfered”. I added a “Yes/No” column to my journal to record this. After a few months I was surprised to find that actually over 50% of those trades would indeed have continued to eventually hit my original target if I had not prematurely closed them.
So I refined and reduced my discretionary interference and, as a result, my target hit rate improved noticeably.
The whole point of a journal is to provide you with some form of analysis of your trading. If it is not doing that then it is not a lot of use. But on the other hand, the process of writing up a journal does have some side benefits, too. It will help make you more disciplined and consistent in your trade entry/exit process and it will help restrict the temptation to intuitively jump into a trade without thinking.