Factors like interest rates, trade flows, tourism, economic strength and geopolitical risk affect supply and demand for currencies, which creates daily volatility in the forex markets. An opportunity exists to profit from changes that may increase or reduce one currency's value compared to another. A forecast that one currency will weaken is essentially the same as assuming that the other currency in the pair will strengthen because currencies are traded as pairs.
Traders can also make short trades (also known as sell trades), where they sell a Forex CFD at the ask price and, once the price drops, buy it at a lower bid price, and profit on the difference. In this case, if the GBP/USD ask price was 1.32265, and the trade closed at the price of 1.31203, the difference would be 0.01062, or 106.2 pips (which would amount to 1,062 USD in profit).
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