The Current Balance field for HELOC accounts within Core iQ represents the total amount that a given customer/member has used out of their total line of credit. For example, if a customer took out a $20,000 line of credit, and has used $15,000 of that amount, then their Current Balance for the HELOC account would be $15,000. Separately, if you were using the Available Balance merge field, then their Available Balance would be $5,000.