Margin trading it not to be done in Cross until you have the ability to save yourself from a position going against you 500% of what you put in
Your margin per trade on cross should never go higher than 5% risk
If it goes higher and you DONT have the ability to add more margin .. then you have placed your leverage too high or you are putting too much in
Managing Your risk a very important part of accumulating- as it means you are developing a business that is sustainably possible
If not - then just be lucky and happy with WIN , WIN , Lose, Lose
Hope that helps.