There was no USD trading today, but its rate decreased

Nevertheless, the National Bank decreased the dollar's rate by itself. Now it makes Br 8240. 

On the contrary, exchange rates of other currencies at the Belarusian currency exchange stock grew today. Thus, the Russian rouble became more expensive - from Br 276 till Br 277. The euro's rate also increased — from Br 10 860 till Br 10 880.