anchor.diff:  
       ticker(Listings).
   
  +
  +%%-----------------------------------------------------------------------------
  +%% Function : ticker/1
  +%% Purpose  : Announces current prices to brokers.
  +%%-----------------------------------------------------------------------------
   ticker(Listings) ->
       Brokers = market_lib:atoms_sequence("broker", "_", 1, ?NUM_BROKERS),
   
  
positive.code: 
  %%-----------------------------------------------------------------------------
  %% Function : ticker/0
  %% Purpose  : Announces current prices to brokers.
  %%-----------------------------------------------------------------------------
  ticker() ->
      % Generate listings
  
negative.code: 
  %%-----------------------------------------------------------------------------
  %% Function : broker/0
  %% Purpose  : Initializes empty data containers and starts broker/2.
  %%-----------------------------------------------------------------------------
  broker() ->
      Portfolio = dict:new(),
      Transactions = [],
      broker(Portfolio, Transactions).
  
  
  %%-----------------------------------------------------------------------------
  %% Function : broker/2
  %% Purpose  : Receives current prices and either buys or sells.
  %%-----------------------------------------------------------------------------
  broker(Portfolio, Transactions) ->
      {registered_name, ProcName} = erlang:process_info(self(), registered_name),
      CashBalance = lists:sum(Transactions),
  