I have been discriminated at my last job by race and gender. I want to have a open case because their are more who endured this discrimination.

typically, the limitation period would be 180 days for a state agency and 300 days for the EEOC.  If you have time remaining, you should first see an attorney about your case.  If time is short, you can contact your state employment discrimination agency or the Equal Employment Opportunity commission about filing a charge, and then meet with an attorney