Basic principles on the sale purchase of currency
Any purchase money exchange involves buying one currency and selling another form simultaneously. Currency quotes are presented as acts; i.e., the value of one currency in relation to another. The offer and the relative demand for both currencies will determine the value of the exchange rate. Eslo which is known as pairs and is represented in the following way: (EUR/USD).
is much more practical to consider pairs as instruments. For example, if you expect the Euro to appreciate, you buy EUR (EUR/USD). What you are doing here is buy EUR and sell USD simultaneously. But it is not practical to see it from that point of view. It is much simpler to consider the "Euro" as the main instrument, so you will be "long in Euros".
Continuing the example, if on the contrary you expect that the USD is that to appreciate, you you sell EUR (EUR/USD), here is selling EUR and buy USD at the same time.Here you are "short euro".
Direct and indirect quotes
Each currency can be quoted directly or indirectly against other currencies (most ofthe time with the USD).
Direct quote: Amount of local currency required to buy one unit of the foreign currency (commonly USD).
USD/JPY
USD/CAD
USD/CHF
Indirect quotation: Local currency amount that is received when a unit of the foreigncurrency is sold (commonly USD).
EUR/USD
GBP/USD
AUD/USD
Quotes Base and against
The first currency of a pair is always called base currency. The second pair is called badge against. Pairs quotes are always expressed in units of the currency against which can buy one unit of the base currency.
EUR/USD = currency base/currency against
This is how many USD are needed to buy a EUR
If the quote for the EUR/USD is 1.2550, then required 1.2550 USD to buy a EUR... and the same applies for other pairs.
If the USD/JPY quote 110.05, then required 110.05 JPY for a USD.

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