multiple orders - unmanaged - bool function for exiting working orders

[er111222]

Regarding the following code to workout whether there is a working order in a price, how to call the bool function of " !IsLevelTaken()"?
Complie error: "No overload for method"IsLevelTaken" takes "0" arguments"

private bool IsLongOrderWorking()
	{
		return longOrder == order && order.OrderState == OrderState.Working;
	}
		
private bool IsLevelTaken(double price, List<IOrder> listLongOrders)
        {
		foreach(IOrder o in listLongOrders)
			{
				if(!IsLongOrderWorking())
				{
				continue;
				}
				if (IsEqual(o.LimitPrice, bidPrice))
				{
					return true;
				}
			}
			return false;
	}

protected override void OnBarUpdate() 
	{
         if(!IsLevelTaken())  // this is the error 
	{
             Do something
        }
        }

[koganam]

private bool IsLevelTaken(double price, List<IOrder> listLongOrders)

Your method is declared with 2 parameters. You must supply 2 parameters when you call it.