It is possible but you need to use the non-API version. Also I believe another forum member has posted that he has got an API version available if you PM him.
Perhaps you should read the thread again......
You can write code for tracking your own prices but need to write your own VBA code yourself (or pay/find a generous individual) to do what you need when BA refreshes excel. This link has an example which tracks the lowest price of lay odds 1