A few thoughts give I, like many others I’m sure use FT for a mixture of long term holds/investments with short term trades.
When you have a fully loaded portfolio, it can be quite overwhelming in the interface when you’re mentally wanting to focus on one or the other (Long term, buy and leave for 5 years, Short term buy and sell potentially in two weeks time)
To support the users mental health a couple of thoughts occur
A. Allow separation of an ISA/GIA account into separate sections (thinking Pots in Monzo) so a user can view/act on long/short term investments separately without distraction (i.e Stress from last weeks NASDAQ downturn!)
B. Allow users to ‘lock’ an investment further by adding friction to the sell process. I.e For those flagged ‘long term’ add a ‘Are you sure?’ Process to support them in decision making. Perhaps with an inputted ‘review date’ to notify the user to consider the position (ala like software Technical doc review dates/Alerts)