function BALVAN() 
       
          local Price={}
 
 return function (I, FSettings, ds)

    local ds=ds
    local FSettings=(FSettings or {})
    local P=(FSettings.period or 9)
    local v_t=(FSettings.v_t or 'C')  
    --------------------------------

    if I == 1 then 

       Price={};  

       local info=getDataSourceInfo(); 

       if info then
               interval,symbol,class = info.interval,info.sec_code,info.class_code
               local sec_info = getSecurityInfo(class_code, sec_code)
       end
    end
 end 
end