Support for a prize pool data is inconsistent between daily fantasy sports sites. RotoTracker takes an intelligent guess about a prize pool, but it is not perfect.
The DraftKings contest history file includes the prize pool in a column for every contest you enter. So for all DK and SD results, this data will be accurate.
Unfortunately, the same cannot be said for Fanduel or Yahoo. Neither of these sites include the prize pool in a column in the history file. However, in these cases RotoTracker will analyze the contest title and can often ascertain the prize pool from that. It's not perfect, but for many GPPs the information is quite accurate.
If you can't find the answer to your question, or you have found a bug, have a suggestion or have feedback, please don't hesitate to contact us! You can email us directly at email@example.com and we'll get back to you!