I investigated FXCM offer and compared their trading conditions to ours. It turns out thet 1 lot SPX500 at FXCM equals 0.1 lot at SimpleFX. You can see it by the pip value shown in attachments. With 1 lot position at FXCM you gain/lose 10 cents per pip. With the same position size at SimpleFX you gain/lose 1 USD per pip. I marked position size, pip value and margin requirements on both screenshots. Required margin at SimpleFX is indeed about 6 USD bigger.
FXCM:
http://i63.tinypic.com/2r7xyqu.pngSimpleFX
http://i68.tinypic.com/2niuv48.pngYes, would explain it :-) Let me check it again.
