Trying to build an MIS Budget report with MIS builder in Odoo 10.0, I need to define KPIs which summarise spendings related to analytic accounts. The following example does not generate a compiling error, but also does not filter the specific budget position and spendings of the desired analytic account:

balp[1700,1800,6300,6500,6570,67%][('analytic_account_id','=','account_analytic_account_2')]

I would like to either relate to the account ID or more preferred the account code. However, I don't seem to figure out the correct way to define this KPI.