It is tough to begin with, but once you get to used to it it isn't tough it's just time consuming.
It is worth doing, though. I've seen managers buy for peanuts and sell for diamonds. I'm talking figures of buying for 400k and selling for 700k+. I've seen some cases where managers can double and a half the price and still sell. A 400k buy and a 700k sell for a 30k guard is a 123k profit in what might take a week. A couple of those per week over a season.... It adds up nicely.
I am really glad, however, about the changes implemented to reduce Day Trading, but there surely can be more. Hopefully what I'm doing will help.