Error CS1001: Identifier expected

Hi,

I tried to improve the News Robot and got the following message: "Error CS1001: Identifier expected".

The exact place in the script where  Identifier expected I marked with the "?".

The script added by me is as follows:

 protected override void OnBar()
        {

            foreach (var pendingOrder in PendingOrders)
            {

                if (_ordersCreated && !PendingOrders.?(PipsAway > 17))
                {
                    CancelPendingOrderAsync(pendingOrder);
                }
            }
        }

Please help me with that.