maintenance funds dropped down at certain period

Hi guys i had certain amount on my acount which was way more than 2800 pounds for couple of months then i had to withdraw some money but left enough to have 2800 ... ( it was around 3510 azn local currency) i was checking oanda until mid of august and 3510 during those 14 days were equal to 2800 then i left the country and had no chance to track the amound i had and now i found out that it dropped by 20 pounds at certain period but then i put more money on my account . I realize it might create difficulties and lead to refuse!? Do you think I can risk?