   .default('b', 100)
   .alias('b', 'buyers')
   .describe('b', 'number of buyers')
+  .default('p', 8)
+  .alias('p', 'parallel')
+  .describe('p', 'number of buyers to run in parallel')
   .default('t', 0.5)
   .alias('t', 'threshold')
   .describe('t', 'buy threshold')

  .env('HOT_CHOCOLATE')
  .config()
  .default('config', path.join(process.env['HOME'], '.hotchocolate.json'))
  .argv

{ seller, buyer } = require './agents'


  debug(argv)

  {key, buyers, threshold, cost, parallel} = argv
  cost = 0.50

  client = new APIClient {key: key}
