Graph inside a registry with special block

[rslemer]

In this point 16h32 this video --> https://youtu.be/aAs2FVJ0veE

You shows a graph inside a account registry

I lovely this idea !

How I can do that?

[joebordes]

It is explained in the wiki; https://corebos.com/documentation/doku.php?id=en:devel:add_special_block#developer_blocks

[rslemer]

oh, sorry, I saw a wiki, but I don't remember has this explanation ...

What diference use a Contact Purchase Order Statistics Widget block, was explain in wiki, or use a workflow aggregate functionality ?

I need to know if the customer has been keeping his purchases, increasing his purchases or decreasing his purchases

I think this would be the best point to develop this, correct?