function pos(stroka)
    for i = 0, getNumberOf("futures_client_holding")-1 do
      local futures = getItem("futures_client_holding", i)
      if futures.sec_code == stroka then return futures.totalnet end
   end
end

 11: attempt to index local 'futures' (a nil value)
  

11: attempt to index local 'futures' (a nil value)
 

is_run = 1
fuc = "SiM5"

function OnStop()
   is_run = 0
end

function pos(stroka)
   local i = 0
   local futures = {}
      while futures.sec_code ~= stroka do
         futures = getItem("futures_client_holding", i)
         i = i+1
      end
   return futures.totalnet
end

function main()
   while is_run == 1 do
      j = pos(fuc)
      message(tostring(j),1)
      sleep(1000)
   end
end

is_run = 1
fuc = "SiM5"
futures = {
         firmid = '',
         trdaccid = '',
         sec_code = '',
         startbuy = 0,
         startsell = 0,
         startnet = 0,
         todaybuy = 0,
         todaysell = 0,
         totalnet = 0,
         openbuys = 0,
         opensells = 0,
         cbplused = 0,
         cbplplanned = 0,
         varmargin = 0,
         avrposnprice = 0,
         positionvalue = 0,
         real_varmargin = 0,
         total_varmargin = 0
      }

function OnStop()
   is_run = 0
end

function pos(stroka)
   local i = 0
      while futures.sec_code ~= stroka do
         futures = getItem("futures_client_holding", i)
         i = i+1
      end
   return futures.totalnet
end

function main()
   while is_run == 1 do
      j = pos(fuc)
      message(tostring(j),1)
      sleep(1000)
   end
end

 T={
T1={test="Hello!"},
T2={}
} 
message(T.T1.test,1) 

function pos(stroka)
   local i = 0
      while futures.sec_code ~= stroka do
         futures = getItem("futures_client_holding", i)
         i = i+1
      end
      return futures.totalnet
end
   

function main()
   
   while is_run == 1 do
      j = pos(fuc)
   --   One()
      message(tostring(j),1)
      sleep(1000)
   end
end

T={
T1={test="Hello!"},
T2={}
} 
message(T.T1.test,1)

T.futures.sec_code

function pos()
   local i = 0
      while futures.sec_code ~= "SiM5" do
         futures = getItem("futures_client_holding", i)
         i = i+1
      end
end