Unless the breakout candle has some momentun to it, then I prefer to take just the 5 pips. A lot of the time you will find the Cable reverses, or consolidates more at this new level, so taking 5 pips is nearly all that you will get.
But on trades where the candle has some momentum to it. Take Friday and the 8.45am breakout. The first part of this, didn't hit my target, it then retraced a little before breaking through with a very positive thrust candle. On this I traded the candle, trailing my stop up after it and took 41 pips ( I probably could have got more), but I was happy with that.
On the other trades at 11.30am and 13.15pm, there was less momentum, so 5 pip profit was safe.
I have noticed that there is usually 1 breakout situation per day where a good number of pips can be taking. It doesn't usually happen twice in one day (quite rarely), so once I've pocketed the pips from an early day breakout, then I'm happy to just take 5 pips at all the following ones.
Hope this makes sense.