Lots of important questions there.
I would like to respond to one point.
As a stock picker, who has chosen to step away from the fundamental "buy the market' rule, you do not have a set rule for when to sell either.
You should know why you bought the share originally, because some positive attribute was not reflected in the price, if you still believe this to be true, hold, otherwise sell. Knowing why you bought should answer the when to sell question.
I would like to respond to one point.
Do you, for example sell/reduce if the PE ratio hits a level well beyond the long term norm for the sector and the specific stock? Conversely, do you buy back/add when the PE falls below that norm, always given that the news-flow does not indicate any reason for the change in price.
As a stock picker, who has chosen to step away from the fundamental "buy the market' rule, you do not have a set rule for when to sell either.
You should know why you bought the share originally, because some positive attribute was not reflected in the price, if you still believe this to be true, hold, otherwise sell. Knowing why you bought should answer the when to sell question.