Long to explain fully but you might have to 1st set up you're awards and configure them, then go to automations and configure the conditions & actions and then go into the menu Automations and execute.
1st: Go to the award menu configure and set up the award.
2nd : In the Automation menu start a new automation and in that menu you will see a few menus on conditions & actions to recieve awards, they can be varied and multiple choiced the important thing is have these conditions and actions configured correctly.
After 100 posts member recieves so and so points.
When member reaches so and so points he recieves award or Rank.
You can pretty much configure it to you're liking and there are a lot of choices. You can also have a few automations. So you could do one award which awards points and then a second award that gives out rank when a certain number of points are received.
After the Awards (1st) have been configured and automations (2nd) you can then use the Execute now option.
Hope this helps until someone gives a better answer, Good luck