The first thing to notice about currency prices in the Forex
market is that there are two of them, called the bid price and
the ask price. The second thing to notice is that they don’t
favor you, the trader; they favor the broker, because that’s
how he makes his money.
The ask price is what you pay should you wish to purchase
that currency pair. Using the GBP/USD as an example, let’s say
you believe the pound is going to strengthen against the U.S.
dollar, meaning that the chart of the two currencies is going
to go up on the graph.
In such a trade you would be purchasing the pound now at a
lower rate (and by definition, selling the dollar) so that you
can sell it later at its (hopefully) higher rate. And, since
the pound is the base currency and it controls the direction of
the trade, to purchase the pound means to purchase the currency
pair. Such a trade is called opening a long position.
The bid price is the exact opposite: it’s what you pay
should you wish to sell, or short, that currency pair. To
continue the example of the GBP/USD, let’s say you believe the
U.S. dollar is going to strengthen against the pound, rather
than the other way around. In this trade, you would be
purchasing the dollar now (and selling the pound) in order to
sell it later.
But remember, it’s the base currency that controls the
direction of the trade. When you purchase the cross currency,
by definition you’re selling the base; in other words, you’re
selling the currency pair rather than buying it. So all the
signals are reversed: the chart will go down on the graph and
the price of the currency pair will decrease.
But because you sold or shorted the currency pair rather
than purchased it, you want the price to decrease, because it’s
the price of the base currency that’s going down while the
price of the cross is going up. In our example, if you shorted
the GBP/USD, you would earn a profit if the price of the pair
went down.
Calculating the number of pips you earn in a short trade is
the same as for a long trade. Just ignore which was the
purchase or the sale price, and subtract the lower number from
the higher one. The difference is the amount of your gain.
Note that the ask price is always higher than the bid. You
have no choice but to buy high and sell low when trading on the
Forex market.
The difference between the bid and the ask is called the
spread, and that’s the amount of money the broker takes as his
commission. (Yes, that’s all the broker takes; he makes his
profit on a large volume of trades rather than large
commissions.)
Obviously, the smaller the spread, the more money you get to
keep out of what you make. Spreads are competitive among
brokers; keeping their spreads small is one means of attracting
customers. And spreads among the most popular currency pairs
are generally smaller than those for pairs that aren’t as
commonly traded, which is one of the best reasons for sticking
with the “forex majors,” as they’re called.
Cautionary Note
There is a risk of substantial loss in Forex Trading. Past trading results are
not indicative of future results.
Ensure that you enroll into a forex trading course
or at least make use of a forex mentor before you attempt "live" trading!