So, I've been messing around w/ machine learning, the basic idea is to use a suppliers stock as an indicator more business to another. The problem I'm having the accuracy score, its wandering around where it shouldn't be, it should be 1 for 100% and 0 for 0% accuracy, but its all over the place for some reason, giving me accuracy of... 2, -1, etc, 4? those can't be real scores, though sometimes its 98% which i still don't trust, i'm not sure if its quantopian or my code.