Tick is 5 points. One tick costs 0,1 USD, and 1 contract costs ~4500 USD or ~225000 points (today`s last trade). Average day volume is 350000-400000 contracts. My day volume is nearly 5000 contracts, size 15 contracts, average day profit is 500-600$ after commisions. Comission is ~0,1$ per round for 1 contract. Well, the main restriction is language =). It will be hard to trade in russian exchanges if you don`t russian language. Taxes are 30% for non-residents and 13% for residents. Apart of this, I don`t see any restrictions.