The current account deficit is critical to deciding on whether to devalue or not.
The forex turnover dropped by 64.4% while the exchange rate remained stable at N386/$1.
Naira appreciated against the dollar at the Investors and Exporters (I&E) window on Monday.
The drop is due to pressure on the black market as a result of a scarcity of dollars.
Ahmed urged the CBN to tackle activities that made speculators manipulate the multiple exchange rates.
The U.S. Dollar Index gained 0.19% to 96.858 by 5.56 am local time on Friday.
The black market rate last touched this low in March 2017.
