Expert Advisor Programming by Andrew R. Young

Order Management
}
if(OrderMagicNumber() == argMagicNumber && OrderSymbol() == argSymbol)
{
OrderCount++;
}
}
return(OrderCount);
We've named our order counting function TotalOrderCount(). It will return an integer value
indicating how many orders are currently opened on the specified chart symbol matching the magic
number that we've passed as a function argument.
We start by declaring the OrderCount variable. Since we have not indicated an initial value,
OrderCount will be initialized as 0. You'll recognize the for operator and the OrderSelect()
function from the previous section.
Since the order pool contains all open orders, including those placed by other EAs, it is necessary for
us to identify which orders were placed by our EA. We check the OrderSymbol() of the selected
order first, and make sure that it matches the argSymbol argument. The we check the magic number
on the order.
If OrderMagicNumber() matches the argMagicNumber argument, we can be fairly sure that this
order was placed by this EA. As long as the user is not running two EA's on the same currency
symbol with the same magic number, we can be certain that this order was placed by this EA. When
running multiple expert advisors on the same instrument, take care to ensure that you're using a
unique magic number on each EA.
If the order matches both our magic number and our chart symbol, the value of OrderCount will be
incremented by one. After we have looped through all of the orders in the order pool, we return the
value of OrderCount to the calling function.
Here's an example of how we would use this in code:
if(TotalOrderCount(Symbol(),MagicNumber) > 0 && CloseOrders == true)
{
// Close all orders
}
If there are orders opened by this EA, and the value of CloseOrders is true (we'll assume this was
set somewhere else in the program), then the code inside the braces will run, which will close all
open orders.
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