Customised Graph Show List

hi everyone i am just curious and new to piwik

I have 2 tables where i need to do a customized plugin. Similar to VisitorsSummary instead i would like to have a more customied version of it.

Number Of Visiors

Number of Signups

Number of Login Users

To show it in the same graph with different lines.

I couldnt find a way to fetch different queries or different parameters.

Can i know is there any advise on this? or how do i do an sql in the plugin ?

Where does “Signups” and “Login Users” come from? If these are custom variables, you should be able to get it from the API.