my $delay_main = Mojo::IOLoop::Delay->new;
  $delay_main->steps(
    get_orderb($self, $delay_orderbooks),
    get_bal($self, $delay_getbalances),
    get_openord($self, $delay_openorders),
    check_bids_asks,
    populate_opportunities,
    find_matches,
    creaord($controller)
  );
  $delay_main->wait; # unless $delay_main->ioloop->is_running;