In the currency pair USD/MAD the first currency to consider is USD and second currency MAD assuming this 10.00090 MAD is needed to buy a USD.
The base currency, that is, the one that has value 1, is USD and the MAD acts as a counter currency that can also be referred to as the quote currency.
10.05020 is the highest price this pair has been at in the last few hours and 10.00090 is the lowest price it has been found at , so, speaking in terms of variation, we can say that it has undergone a variation of -0.43000% due to the amount of difference of -0.04360.