Hi guys,
after downloading Assets.dta with download script, I've found that:

there are Margin differences between in some assets:
(NAS100, SPX500, UK100, US30 and XAG/USD)

between a demo account from FXCM-UK and demo acct. from FXCM-AU, (both acct. in EUR currency):

SPX500 margin FXCM-UK= 8.000
SPX500 2053.10 0.50000 -0.0883 -0.0883 0.1000 0.08821 8.000 1.0

SPX500 margin FXCM-AU= 12.000
SPX500 2052.63 0.50000 -0.0883 -0.0883 0.1000 0.08822 12.000 1.0



seems that it's important to update Assets.dta for the selected account to test or trade (and copy it to AssetsFix.dta - this is obvious).