I literally admire traders that using trading journal, even those manual only, just like paper and pencil or even a excel document. There are some trading journals that are automated but some of them may charge you for subscriptions, but for me using these kinds of tool for trading is really the best move.
My small tip for using trading journal is, NEVER STOP to write downs all trades, even just a small position or trades, just write it down, we should practice this.
You're right and using a trading journal you can track always your previous and recent trades, in such a way you can also determine what is right and wrong with the trades you did. It will really help you to have discipline in making trades. So it is very advisable to use a trading journal.