docs: function () {
      log ('     Non-strict search: node', process.argv[1], 'symbol'.green)
      log ('     Non-strict search: node', process.argv[1], 'currency'.green)
      log ('         Strict search: node', process.argv[1], '--strict', 'argument'.green)
      log ('   Search markets only: node', process.argv[1], '--markets', 'argument'.green)
      log ('Search currencies only: node', process.argv[1], '--currencies', 'argument'.green)
  
  }