Burn Down Graph

We're using Wrike to manage quite complex projects (hundreds of tasks, divided in sprints) and we've not found a way to produce something similar to a burn down graph, showing the estimated versus actual velocity of a project or a part of it. Velocity could be expressed either is number of tasks or hours.

Here is an example:

We are extensively using this graph as an high level KPI and we're struggling to find something in Wrike summarising the status of a complex project in a very clear way. 

Is there anyway to get something similar or equivalent ? How do you manage a complex project overall status ?