<prompt> Human: I had a 734 with a short credit history average of about 2 years. i opened an amazon credit card, i figured increasing my limit would be better. According to credit karma, because it knocked down the average of my credit history, my credit score got massively docked. Should I cancel this account? or what should i do?  <response>: Are you opening a mortgage tomorrow? Are you opening new lines of credit? Dont pay attention to daily fluctuations in your score. This will not hurt you long term. CK is wildly inaccurate for some. 