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I update prices every day - I go through a process of looking at winners and losers. I do that at least once during the evening too when markets are open. I watch enough markets TV to get a feel for what is happening every day - twice a day when I eat and once in the evenings before Europe opens. I am looking for big patterns and shifts.

That flow of data keeps me on top of what is moving. Writing up the journal helps a lot. Running things on a calendar works too - covered calls; options expiry, published announcements (I read them all)

For the rest I rely on remembering things.

Lately I have been opening small positions - market has not felt comfortable for big positions. That means I have a lot to track. My pension portfolio updates over 300 positions every day and another 30/40 or so European options positions which I update once a week. I am beginning to miss things = too much to track.