USD/QAR is the currency pair comparing the price of USD/QAR to that of USD/QAR and this means that we want to know how much of QAR we need to buy one USD. That amount is currently in 3.64000.
In this case, the base currency or transaction currency is USD and the QAR is the quote currency and you can also call it the counter currency.
We have been able to observe that in the last hours the lowest value that this currency pair has had has been 3.64250, while the highest value has been in 3.66300 , this translates to a percentage of the 0.40000% by having a variation of 0.01440.