Ok, I checked it out on my other broker account i placed a trade for 1 lot in spx500 entry long 1871.9 exit 1873.0 profit=1.10$ same trade at 0.01 lot (1/100) on simpleFX entry long 1871.3 exit 1872.7 profit=0.14$ so based on this test that had the almost same margin requirements of +/- 10$. SimpleFX is still 10x more expensive to trade at.