Trade small.Allow error distance meaning say you want to sell UJ at 102.70 but factor in that it might go to 102.90 that's 20pips "error" hence if you averaged in on price .5 at 70 .5 at 90 your average price is lot better then full lot at 70.
I never never enter all my lots at once.Advantage is should the trade go against you and you decide its no longer valid trade then taking a loss at .5 lot is lot better then full lot.Trading small also allows time to work in your favor.Example Today USD is smoking hot but next week could be all going south and waiting that period is crucial however most people over trading will take the loss because of fear.
In trading, you have to be defensive and aggressive at the same time