for example say let's assume that you're traveling from
the US to Switzerland you'll have to convert your US dollars to Swiss francs
the symbol for this pair is USD
slash CHF you'll need to look at what the exchange rate for USD slash
CHF is there will be to rate shown
one is the bid price and the other the ask price
the bid price is the rate that you can sell your currency to the dealer for
the ask price is the price at which the dealer will sell the currency to you
the current asking price for USD slash