IMHO, looking for X pips a day is not wise. You have no idea of how tomorrow will be or your next 1, 3 or 5 trades. Better to look to achieve a highest possible percentage per day of the overall moves.
For example, If cable broke the lowest support and hovered at your target 40 pips, you'd take it and walk away a happy (wo)man. What happens then if Cable then drops another 60/80 and tomorrow its in a 20 pip range all day and you lose 5 trades in a row? Not only have you lost all from yesterday and more, if you'd have stayed in your trade until a solid reason to exit appeared, you would have covered the losing day and still been up over the 2 days.
It is much better to have a good reason to exit a trade, not just a 'if I make X a day I'll earn X a month' because who knows what the next hour/day/week will bring... It just ain't that simple... You have to maximize each day...
Just my $0.02