Trading foreign exchange on margin carries a high level of risk and may not be suitable for all investors. The high degree of leverage can work against you as well as for you. Before deciding to trade foreign exchange you should carefully consider your investment objectives, level of experience and risk appetite. The possibility exists that you could sustain a loss of some or all of your initial investment and therefore you should not invest money that you cannot afford to lose. You should be aware of all the risks associated with foreign exchange trading and seek advice from an independent financial advisor if you have any doubts.
Confirmation bias is the one factor that is most common amongst professional traders. Looking for information that will support a decision you have made, even if it wasn't the best decision, is simply a way of justifying your actions and strategies. The problem is that by doing this, you're not actually improving your methods, and you're just going to keep making the same trading mistakes. Unfortunately, this can create an infinite loop in Forex trading psychology that can be difficult to break.
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.