I found a way how I can evaluate my profit from Forex, but in absolute terms.
Due that I all the time fund and withdrawing money from my forex account,
I can not have a way to say exact percentage.

MAY-2007 - between 33% to 42%
YTD - about 132%
EUR/USD YTD - 1.19 - 1.34 = ~11%
YTD ALPHA - 132 - 11 = 121%