It's showing the net result when you add up withdrawals and deposits. It's a bit confusing though because what i'm calling a "withdrawal" here is someone sending value from their personal account to an exchange which would mean they are (most likely) intending to sell that value. What I'm calling a "deposit" is when an account takes value off an exchange and puts it into their own account. It's confusing because, from the standpoint of the exchanges, those terms are reversed. So a "withdrawal" is, from the point of view of an exchange account, actually a deposit (for them). I'm open to any suggestions you have to how I could make this less confusing.