Also make sure you understand the FBAR threshold. It's the aggregate value of all accounts, not individual AC values, and it's based on the maximum for each AC.
Just simplistically - say you had the equivalent of $5,001 in current AC #1 on February 1, and decided to do a 'switch' and opened current AC #2 on Feb 15 - moving $5K to AC #2 because you spent $1 in the interim. Well......the aggregate value of the accounts for that year is....not $5001, but $10,001. Seems like fuzzy math, but that's the way it works.
So look at each account, and note the highest amount in each account during the calendar year, at whatever point in time. Never mind how long the money was on deposit, or whether it went in and out in a matter of nanoseconds to another account.
Personally, I would file anyway, just for the paper trail...AND you need to file the IRS form that shows you are exempt from the ACA charge (assuming you meet the bona fide residence or physical presence test).