I would counter with this observation:
Using a "successful" company as the model for
maximizing returns by remaining long is probably a
false assumption.
I do agree that, with constant reminder on this MB,
that miracle timing is not likely let alone the norm
in investing. However, to say that NEVER in the history of
owning AAPL I was not justified in selling is just not
accurate or in fact unbiased if believed.
I don't find "day trading" to be an exercise I am willing
to actively pursue with the necessary discipline to succeed.
But, I do trade on Market sentiment and a certain perception
of TA reversion to the mean or as my father called it...
repetition by habit.