I will tell about profitable forex carry trade system that I use myself :

pairs AUD/JPY ; GBP/JPY ; NZD/JPY
open just BUY (long) positions
entry signal will find with an indicator CCI (14) on 1 Day graphic , the signal is when an indicator show less than ( -100)
a leverage not more than 1:2
Stop Loss = 500 pips , Take Profit = 1500 pips , Trailing Stop will move after each 100 pips along amount to non-loss zone , than we waiting when a price to reach Take Profit
this position earn 1-2 pips as positive swaps each day
dont open a deal if you have already opened position
deals amount will be 4-6 per year , single deal lifetime is 1-2 month

of course , will be battle casualties , but you will take approximately +50% profit per year!

regards,
greenrun