Stop forgetting why you bought every stock you own.
Write your thesis. Track how it goes.
Capture your thesis
Journal your thoughts for every position.
Every position starts with a why. Write your thesis to capture it.
Versions, not edits
See how your thinking evolved.
When your view changes, write a new version - the old one stays preserved. So you can look back and see how your reasoning actually evolved.
Watch it age
Yahoo Finance prices and your thinking, side by side.
See whether your reasoning held up.
The daily journal
Read back your notes.
Add a note to a position to capture your thoughts.