I'm thinking cause Ive have a contest in our Local Group that needed as well 5merits. Though the merits could be gone on personal merit profile once it reaches more than 120days right.
Well, that depends on your rule/s about the needed merits earned because if you just said that a certain user just needed 5 merits to be eligible, then, a Jr. Member can be counted as eligible for that but if you say so that you must at least have earned 5 merits on the past 120 days that's easy to tell you just have to
Click their profile > Merit > scroll down below if they earned the required merit or not.
You can try the latter suggestion but you can do the thing here too AFAIK, on the mighty
Bitcointalk Merit Dashboard by our very own DdmrDdmr.