double MySMA =Double.parseDouble(String .format("%.5f",indicators.sma(MyInstrument, MyPeriod, MyOfferSide, IIndicators.AppliedPrice.OPEN, MySMATimePeriod, 0)));
MyOrder = engine.submitOrder("BUY", MyInstrument, OrderCommand.BUYSTOP_BYBID, 0.001, MySMA,10);

Can you help me how to use the MySMA price every two seconds for MyOrder stop-loss price to modify?
I think it's too difficult!

Subcribe to a Period.TWO_SECS feed and run the code from there, see:
https://www.dukascopy.com/wiki/#Chart_feeds/Subscribe_to_a_feed

Please elaborate..

Provide full example strategy of yours and describe which part you can't figure out how to implement.

OK!this is my code ..I want to modify the openPrice every ten seconds...
But the results have remained unchanged,please tell me where is the problem?

import com.dukascopy.api.*;
public class ModifyLimitOrderWithMessages implements IStrategy {

    private IConsole console;
    private IEngine engine;
    private IHistory history;    
    private IOrder order;
    
    public void onStart(IContext context) throws JFException {
        engine = context.getEngine();
        console = context.getConsole();
        history = context.getHistory();
        
        ITick tick = history.getLastTick(Instrument.EURUSD);
        double openPrice = tick.getBid() + 0.0020;
        double slippage = 1;
        
        order = engine.submitOrder("order1" , Instrument.EURUSD, IEngine.OrderCommand.BUYSTOP_BYBID, 0.001, openPrice, slippage);
        console.getOut().println(String.format("%s, amount=%s, open price=%s",order.getLabel(), order.getAmount(), order.getOpenPrice()));
        order.waitForUpdate(2000); 
        
        while(slippage>0)
        order.setOpenPrice(openPrice+0.002);
        order.waitForUpdate(10000);
}

use the onBar method with 10 sec bar filtration, see onBar description here:
https://www.dukascopy.com/wiki/#Strategy_API