If you use a breakout model, how do you determine your TP and SL?

I'm using a breakout EA and am interested in trying some new approaches to determining my TP and SL levels. What have been the most successful methods for your breakout method?

A good SL is at the other end of some previous candle.
There's no perfect TP target but it should be big enough for a R:R bigger than 1 and don't forget to take some partial profits.

Do you take ATR into consideration? Seems to me that if you use a previous candle for the SL then the TP should be variable as well.

You adjust your TP according to the size of your SL. ATR should also work.

I use a measure of the standard deviation of the candle sizes, so as to place the stop far enough away so that only big negative move will take it out. Why have a TP on a momentum play? Breakout systems need to ride their winners to the end.

How do you determine where the end is then? I like strict MM and that's why I try to use a set TP.

Nobody knows where the end is.

Well yea. I probably should have asked, 'when do you end your runs?' Eventually you take your profit. When do you personally do so?

I know some people think this is a dumb idea, but it been proven in my testing to increase my profit anyway...I don't take profit in a strict sense, I scale into breakouts.
I will slide a stop, when the stop gets to break-even, I open a new trade in the same direction with the same S/L, I do this until all trades are closed via S/L. By doing this I am keeping my downside risk constant whilst letting the reward run. Obviously sometimes this will not work, but when you get a decent breakout this method allows you to really ride it into the ground. Momentum strategies use win/loss size to get a positive expectation as usually then have more losing trades than winning trades.

Anyone had any success using multiples of Fibs as exit points?