How to get site evolution

Hello sir,
I’m new for piwik and I’m happy to use it
I’m asking for how I can get website evolution via api (site up - site down )
like up arrow and down arrow ,

The second question
I need to get month visits for site like :
2011-12-1 | 10 visites | 20 page view
2011-12-2 | 10 visites | 20 page view

via on request in api
please help me about that


updates …