Just wanted to get a ballpark idea how much I'm worth...

Job Title : Technical Writer
Job Description : Consultant
Years spend : 6 months
Industry : IT
Company : MNC
Tenure : --
qualification : Degree
Employment Level : --
Experience b4 join : Freshie
Salary : 1800

I'm still on probation... means I may get a pay raise after... so I need an idea how much I can ask for without being given the boot instead