In practical terms, this manifests itself in traders holding losing positions open for too long, simply because they fail to consider the options that are outside of their comfort zone. You must not be afraid of trying new things when trading Forex - be willing to try new strategies, and go against what you know. By anchoring yourself to outdated strategies and knowledge, you're only increasing the probability of bigger losses.
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.