Thanks for BBH and BBL definitions, RT, that is quite correct.
Hi doylen - you've probably noticed I like the idea of a fixed quantity of points as BB target/stop, and using BBR certainly made me a profit in 2010: using a percentage of BBR as discussed might do better.
However, as for stopping trading when a certain return is reached, I don't understand this in the context of trading. If the odds are against you, such as at roulette, sure, quit while you're ahead, as the longer you play, the more likely those odds will assert themselves and you will be a loser. But quitting when ahead using a system that puts the odds in your favour is surely like being the casino owner and closing when your first punters through the doors this evening have just made a loss - so what, that's what is supposed to happen.
e.g. I didn't trade Monday (foolish error) but am 3-0 up this week so far. That's a handsome return even though I don't use a single week as an accounting period. So I will go ahead and trade tomorrow as the worst that can happen is I will go into the weekend 3-1 up, all trade sizes being identical. After all, the odds are in my favour such that if I made the same decision every week for a year, I would be a winner.
Onwards and upwards!