Honestly .... 300-400 in gbpjpy is just wrong entry . Even if you want to positoin trade a 4 hour get the right entry on a 60 or 30 min chart.
If you trade 20 lots you got to have a massive account
and if everything falls apart and your techanical anaylsis is wrong in the end you will down 300 - 400 pips ... err only 60 to 80 k on 20 lots.
max stop you should have on postion trade gbpjpy is 200.
300-400 means you are not managing your risk properly.
PS this posting is for newbiesIgnored