local run = true
local cls = 'SPBFUT'
local sec = 'RIU0'

function OnStop()
   run = false
end

function main()
   if not Subscribe_Level_II_Quotes(cls, sec) then
      error('Subscription failed')
   end
   while run do
      local t = getQuoteLevel2(cls, sec)
      if t then
         message('bid: ' .. t.bid_count .. '\nask: ' .. t.offer_count)
      else
         message('getQuoteLevel2 failed')
      end
      sleep(1000)
   end
   Unsubscribe_Level_II_Quotes(cls, sec)
end

Subscribe_Level_II_Quotes("SPBFUT", inst)

sleep (500)

qt = getQuoteLevel2 ('SPBFUT','SRU0')

qt = getQuoteLevel2 ('TQBR','GAZP')