Hi guys, I'm new to CF. I try to give all the Div 2, 3, 4 contests but have managed to only become pupil till now. I was trying to analyze my profile using this tool : Codeforces Analyzer : Link and saw something strange.

In my first 5 contests I have performed really well, 2 contests have performance rating around 1800, 2 have around 1500 and one has around 1600 but the next 5 contests after that, I have performed poorly with an average performance rating of around 1200.

Because of this I was practicing questions of problem rating 1200 for some while. But now I'm confused, what do these rating show and what is my actual level and most importantly what problem rating should I be practicing?

Thanks.