first i submit a order with specified label and other setting like price, stop loss, take profit, and so on, i cannot find this order by the label after this order was closed. it always say that the null pointer. i found the value of [ order ] was always null. where am i wrong?

my purpose is, if you submitted several orders and they are filled, in the running time, how can you figure out which one close. i want to use the label to identify different orders, but seems order was null after they are closed.

Hi,
You can get an order label after it is closed in the onMessage method. Please consider the following code:

public void onMessage(IMessage message) throws JFException {
    if (message.getType().equals(IMessage.Type.ORDER_CLOSE_OK)) {
        console.getOut().println("Order was closed: " + message.getOrder());
        console.getOut().println("Order label: " + message.getOrder().getLabel());
    }
}

no, you did not understand my question, i know the label for certain order. my problem is, if i have several filled positions, if one or several of them were closed, i want to use the label to figure out the closed position, and then to get the close time or close price as below

// after order was closed
IOrder order = engine.getOrder( label ); // but when it goes here, it always say null pointer
long close_time = order.getCloseTime() / 1000;

can you give me some code samples if we know the label and want to use the label to find the order?

o, i think i found the reason, i guess,
if a position was closed, it is not in ENGINE, so if you want to use
engine.getOrder
to find some order, the states of the order can only be CANCELED, CREATED, FILLED, and OPENED, if you want to find a closed order, you should use message function to find the closed order.

is that right, supporter?

Yes, it is right. Or you can add orders labels in the List<String> and then check if order with label from the list exists in the ENGINE, if no, then order is closed.

thanks, why not add some explaination in the API, something like this is very hard to find the answer.

Thanks for your suggestion hanghangzhu. We will add comments to the API javadocs. Currently information is available in the following JForex Wiki page: https://www.dukascopy.com/wiki/index.php?title=IEngine