Trading psychology is by far, the most overlooked aspect of profitable trading.  To say it another way, you can use many strategies to turn a consistent profit, but you cannot trade profitably if you have yet to master the emotional side of trading. There is no exception to that rule. You cannot turn a profit while revenge trading. You cannot turn a profit if you’re over-leveraging and doubling down to

The mere expectation or rumor of a central bank foreign exchange intervention might be enough to stabilize the currency. However, aggressive intervention might be used several times each year in countries with a dirty float currency regime. Central banks do not always achieve their objectives. The combined resources of the market can easily overwhelm any central bank.[62] Several scenarios of this nature were seen in the 1992–93 European Exchange Rate Mechanism collapse, and in more recent times in Asia.
In every part of life, discipline is important, but neglecting discipline in day trading may potentially result in huge losses. Success without discipline is practically impossible. You need to be able to monitor prices for extended periods of time without making any rash trading decisions. This is hard and requires lots of discipline. Sometimes seeing profitable market moves that you have predicted but did not execute is painful, yet it is better to waste an opportunity, than to guarantee a loss.
Major Currency — currencies from the world’s most developed economies including Europe, Japan, Canada, and Australia — represent the most heavily traded and liquid currency markets for any forex trader. A major currency pair is created when one of these currencies is traded against the U.S. dollar. Examples include Euro vs. the U.S. Dollar (EUR/USD) and the U.S. Dollar vs. the Canadian Dollar (USD/CAD). Their availability on a forex brokerage is essential.

Since the market is made by each of the participating banks providing offers and bids for a particular currency, the market pricing mechanism is based on supply and demand. Because there are such large trade flows within the system, it is difficult for rogue traders to influence the price of a currency. This system helps create transparency in the market for investors with access to interbank dealing.

Forex is a portmanteau of foreign currency and exchange. Foreign exchange is the process of changing one currency into another currency for a variety of reasons, usually for commerce, trading, or tourism. According to a recent triennial report from the Bank for International Settlements (a global bank for national central banks), the average was more than $5.1 trillion in daily forex trading volume.