Do you simply not understand? Click on the graph.
that's it. Click on the graph and then tell it how far you want data for. Or click export, and then customize the dataset. It's also set to a default that YOU can modify by going to "edit" for that particular item.
Your continual prise of PRTG makes me wonder if you have financial motivation as everyone has implied or you simply can't even comprehend that there might be better tools that do what you want. Either way is not productive for you or anyone else. Please actually explore the Orion toolset and read documentation, maybe even respond to people without nothing but complaints and be a productive member of the forum.