However, this can steer you away from a carefully planned trading strategy. Even worse, it could cause you to make rash decisions, with the hope of turning that losing trade around, causing you to lose much more money than you would have if you had just left it to play out. Instead of focusing on the long term plan, your mind wants to focus on making the best out of this short term losing position.
The blender company could have reduced this risk by shorting the euro and buying the USD when they were at parity. That way, if the dollar rose in value, the profits from the trade would offset the reduced profit from the sale of blenders. If the USD fell in value, the more favorable exchange rate will increase the profit from the sale of blenders, which offsets the losses in the trade.
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.