private bool TryUpdateStockPrice(Stock stock)
        {
            var r = updateOrNotRandom.NextDouble();
            if (r > .1)
            {
                return false;
            }

            var random = new Random((int)Math.Floor(stock.Price));
            var percentChange = random.NextDouble() * rangePercent;
            var pos = random.NextDouble() > .51;
            var change = Math.Round(stock.Price * (decimal)percentChange, 2);
            change = pos ? change : -change;

            stock.Price += change;
            return true;
        }
 private void BroadcastStockPrice(Stock stock)
 {
     Clients.All.updateStockPrice(stock);
 }