Mt. Gox trading fee will be: NaN%

[kecksk0enig]

Getting this error when trying to actual enable trader..

2013-11-19 15:10:25 (INFO): Using normal settings to monitor the live market
2013-11-19 15:10:25 (INFO): Profit reporter active on simulated balance
2013-11-19 15:10:28 (INFO): trading at Mt. Gox ACTIVE
2013-11-19 15:10:28 (INFO): Mt. Gox trading fee will be: NaN%
2013-11-19 15:10:28 (INFO): current Mt. Gox portfolio:
2013-11-19 15:10:28 (INFO): Calculating EMA on historical data...