cost $2/$100k (.00002) with a minimum commish of 2.50. i.e. short 100,000 sterling = $149,120 (est close of 12/08/08). Cost = .00002*149120 = $2.98.
Minimum size on Ideal Pro is $25k.
Margins are 2.5% on most majors (40:1) but margin is calculated 2x if trade is not in base currency, i.e...