Okay, tell us a little, see,! One example of arbitrage is, you do buy and sell premium pertamax, buy and sell grain rice, soybeans buy and sell out, buy and sell LQ45 JCI, buy and sell EURUSD AUDUSD, if you perform the transaction you will meet the following conditions , while your position profit USD.3000 buy EURUSD, AUDUSD you may sell when it is loss USD. 3700, or vice versa, and we can not meliquid positions in such conditions.