Three major polling houses published their polls this week: MDA, Ibope, and Vox Populi. The following numbers incorporate these data. With current data, a runoff between Dilma and Marina seems to be inevitable (.87), though its certainty has decreased from the previous week as the following chart indicates.
How to understand the following plots: The big dot at the end is my best guess where, I think, the candidate will end. The “plus” signs represent the polling data estimates published by polling houses.