Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to calculate arbitrage in forex [title] Understand the foreign exchange market. [step] The foreign exchange market, commonly referred to as forex, is an international exchange for the trading of currencies. It allows investors (from large banks to individuals and everyone in between) to trade one national currency for another.

Ending1: [substeps] Currency exchange rates are extremely high, so you may need to increase or decrease your business to help you do this. You can do this yourself by having food stamps seized and applying currency for a passing period of time before displaying your currency. Ending2: The currency used in this exchange is currency from the overseas western union bank (nba), the biggest exchange exchange for international exchanges. In turn, a new bank in the country may trade one foreign exchange and follow that exchange. Ending3: Over the course of several weeks, industry investors can invest several million to satisfy their natural enemy. Currently, this is the largest trading phenomenon in the world, and there are mutual funds and stocks that yield at least a 20% share in one currency. Ending4: Each trade is both a purchase and a sale, as one currency is sold in order to buy another one. This duality means that each currency is priced only in relation to another currency.

Answer format: ending1/ending2/ending3/ending4