Some codes, numbers and definitions.

Each currency is assigned a three-letter code. For example, US dollar is coded - USD (United States Dollar), euro is coded EUR (EURo), Swiss frank is coded CHF (Confederation Helvetica Franc), Japanese yen is coded JPY (JaPanese Yen), British pound is coded GBP (Great British Pound). The currency codes are defined by ISO-4217 standard. Usually they are formed as a two-letter ISO-3166 country code and the first letter of currency name. There are a few exceptions most notable being the euro (EUR).
Currency rates are equal to ratios of currency units of different countries relative to each other. The rates are represented by 6-letter words composed of two three-letter currency codes. The first position is occupied, as a rule, by the code of a more expensive currency. The rates are expressed in units of the second currency per unit of the first one. For example, rates USDCHF (USD-CHF) show the number of Swiss franks in one US dollar, but rates GBPUSD (GBP-USD) show the number of US dollars having to be paid for one British pound. More detailed information on the codes of financial instruments may be found in this table.
How to read quotes.> The rates are usually expressed as five-digit numbers. For example, USDJPY = 121.44 means that 1 US dollar is valued at 121.44 Japanese yens (i.e. they are willing to pay you that many yens for one US dollar while you are buying or selling). At the same time, GBPUSD = 1.6262 means that 1 British pound is valued at 1.6262 US dollars. Generally, if the rate XXXYYY = Z, it means that one unit of XXX is worth Z units of YYY.
When the rate has changed, for example USDJPY = 121.44 to USDJPY = 121.45 or GBPUSD = 1.6262 to 1.6263, they say that the rate has moved 1 point. As it follows from the information above, yen in this example has DEPRECIATED by 1 point, but the pound has APPRECIATED, also by 1 point.
While watching the charts, you should keep in mind that only euro (EURUSD), British pound (GBPUSD) and Australian dollar (AUDUSD) charts reflect real movements of the rates of these currencies (that is, chart going up, means increasing price), as growth (that is, charts moving up) mean decreasing rates (prices) for the other currencies.
Sometimes quotes are given as a pair, for example 121.44/49. It is a BID/ASK pair: the first number is BID, then the two last figures of ASK. Knowing that ASK is always higher than BID and that the spread is under 100 points, the full ASK real prices can always be defined. In this example ASK = 121.49.