Not as much as on the stock exchange where members of the Exchange have equal access to the share price, the foreign exchange market is divided into several levels of access.

At the highest level of access is the interbank market (PUAB), which consists of companies and investment banks.On PUAB, the difference between the bid price/sale price (ask) and price request/purchase price (bid) is a very thin even once usually doesn’t exist, and this price is valid only for their own unknown by foreign exchange players outside of their group.

On the level of access below, range the difference between the selling price and the purchase price to be great depending on the volume of transactions.

If a trader [7] can guarantee hinterland foreign exchange transactions in large numbers then they can request that the difference in the value of sell and buy reduced called better spread (the difference between the selling price and buying).

Level access to the foreign exchange market is highly determined by the size of the exchange transactions undertaken.

Top-ranked banks controlled the “interbank market (PUAB)” up to 53% of the total value of the transaction. And after top-ranked banks were then ranked next is a small investment banks and mulch-national companies big (which require risk hedging transactions as well as pay officers in various countries), a large hedge fund [8], and also retail merchants determiner the foreign exchange market.

According to Galati and Melvin [9], pension funds, insurance companies, mutual funds and institutional investors is a player who has a major role in the financial markets in General and in particular to the foreign exchange market since the Decade of the 2000s.