If you want to add notes for your trading day you can do so by visiting the Daily Journal and clicking on the ''write a note'' icon on the day you would like to add notes for.
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This should now open up a pop up where you can document your lessons learned and notes for the trading day! Make sure to hit ''SAVE'' when done to record the notes entry. You now have a note applied to the trading day that you can always refer back to later ;)