public ActionResult EditTrade(long?id)
        {
            if (id == null)
            {
                return(RedirectToAction("Error404", "Home"));
            }

            var model = new AddTradeViewModel()
            {
                TradeGroups = blTradeGroup.Select().ToList(),
                Trade       = blTrade.Find(Convert.ToInt64(id))
            };

            return(View(model));
        }