Please check following links:

Forum Rank / Positions: https://bitcointalk.org/index.php?topic=178608.0

Other useful links for newbies

Read before posting   - https://bitcointalk.org/index.php?topic=1689727.0  
Rules, Guidelines, FAQ -  https://bitcointalk.org/index.php?topic=703657.0    
FAQ, Merit - https://bitcointalk.org/index.php?topic=2766177.0  

If you have any other question let me know.

Ranking system consists of two parts: Activity and Merit


Rank              Activity                  Merit

Brand New:         0                         0
Newbie:             1                         0
Jr. Member:        30                        0
Member:            60                       10
Full Member:     120                      100
Sr. Member:      240                      250
Hero Member:   480                      500
Legendary:       775 to 1030          1000