hi, support:

I am a new guy on java,
I just copy the singal jar example:

import com.dukascopy.api.*;
public class MA_Play implements IStrategy {
    private IEngine engine = null;
    private IIndicators indicators = null;
    private int tagCounter = 0;
    private double[] ma1 = new double[Instrument.values().length];
    private IConsole console;
    public void onStart(IContext context) throws JFException {
        engine = context.getEngine();
        indicators = context.getIndicators();
        this.console = context.getConsole();
        console.getOut().println("Started");
    }
    public void onStop() throws JFException {
        for (IOrder order : engine.getOrders()) {
            order.close();
        }
        console.getOut().println("Stopped");
    }
    public void onTick(Instrument instrument, ITick tick) throws JFException {
        if (ma1[instrument.ordinal()] == -1) {
            ma1[instrument.ordinal()] = indicators.ema(instrument, Period.TEN_SECS, OfferSide.BID, IIndicators.AppliedPrice.MEDIAN_PRICE, 14, 1);
        }
        double ma0 = indicators.ema(instrument, Period.TEN_SECS, OfferSide.BID, IIndicators.AppliedPrice.MEDIAN_PRICE, 14, 0);
        if (ma0 == 0 || ma1[instrument.ordinal()] == 0) {
            ma1[instrument.ordinal()] = ma0;
            return;
        }
        double diff = (ma1[instrument.ordinal()] - ma0) / (instrument.getPipValue());
        if (positionsTotal(instrument) == 0) {
            if (diff > 1) {
                engine.submitOrder(getLabel(instrument), instrument, IEngine.OrderCommand.SELL, 0.1, 0, 0, tick.getAsk()
                        + instrument.getPipValue() * 10, tick.getAsk() - instrument.getPipValue() * 15);
            }
            if (diff < -1) {
                engine.submitOrder(getLabel(instrument), instrument, IEngine.OrderCommand.BUY, 0.1, 0, 0, tick.getBid()
                        - instrument.getPipValue() * 10, tick.getBid() + instrument.getPipValue() * 15);
            }
        }
        ma1[instrument.ordinal()] = ma0;
    }
    public void onBar(Instrument instrument, Period period, IBar askBar, IBar bidBar) {
    }
    //count open positions
    protected int positionsTotal(Instrument instrument) throws JFException {
        int counter = 0;
        for (IOrder order : engine.getOrders(instrument)) {
            if (order.getState() == IOrder.State.FILLED) {
                counter++;
            }
        }
        return counter;
    }
    protected String getLabel(Instrument instrument) {
        String label = instrument.name();
        label = label.substring(0, 2) + label.substring(3, 5);
        label = label + (tagCounter++);
        label = label.toLowerCase();
        return label;
    }
    public void onMessage(IMessage message) throws JFException {
    }
    public void onAccount(IAccount account) throws JFException {
    }
}

what I want close the current position by market price, not by stop loss or take profit. how can I change :

if (diff < -1) {
                engine.CLOSEOrder()

?

Thank you.

To close an order, use the IOrder interface function close(). It means that, you need an orders instance to close it. The order instance is returned, when a function submitOrder is called from an IEngine. Or you could try to get it from IEngine using one of the functions getOrder(label) or getOrderById(orderId). For example:

       if (engine.getOrder("MyOrder") != null
             && !order.getState().equals ( IOrder.State.CLOSED )
                  && !order.getState().equals ( IOrder.State.CANCELED ) ) {
          engine.getOrder("MyOrder").close();   
       }