Conversion operations - this is the treatment of one currency to another at an agreed rate of the two parties to a certain date. The basic approach to profit is to buy a currency and sell cheaper, but at a higher price, or vice versa, you sell more, then buy it the same, but cheaper. This approach is called arbitration. Temporary arbitrage - is the opening position at one time and closing it after some period after the movement of prices. Spatial arbitrage - trading with a small difference in prices in different financial markets at this particular moment in time. In this case, the position is opened and closed almost simultaneously, in time catch profitable difference in prices. Cross-arbitration - profits made on foreign

Any quotation - or reverse - the client is selling the base currency at the rate of Bid and Offer (the highest rate). The difference between Bid and Offer rates is called the spread (Spread - the difference between the rates of Bid and Offer). Naturally, the customer is always beneficial for a small spread. Banks are more willing to work with a small spread, when the currency has high liquidity, and to a lesser extent, when the market volume of trade of the currency low. In this case, it is difficult to find a partner and close the currency position. For safety reasons, spread increases as compared to conventional markets in volatile markets, before the publication of important economic data due to political events