I'd like to track my drawdown in terms of USD. Could someone explain or give an example of how I would create a variable that could be saved to my PC and how I make some code that would check it and update if the current drawdown > myVariable? The idea is to track my drawdown forever, not just the biggest drawdown of each time i log in. To do this I imagine I would have to save the data to my hardrive somehow?

Hi,
Please consider the following code. Path to log file is displayed at the start of the strategy.

package jforex;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.TimeZone;

import com.dukascopy.api.Configurable;
import com.dukascopy.api.IAccount;
import com.dukascopy.api.IBar;
import com.dukascopy.api.IConsole;
import com.dukascopy.api.IContext;
import com.dukascopy.api.IEngine;
import com.dukascopy.api.IHistory;
import com.dukascopy.api.IMessage;
import com.dukascopy.api.IOrder;
import com.dukascopy.api.IStrategy;
import com.dukascopy.api.ITick;
import com.dukascopy.api.Instrument;
import com.dukascopy.api.JFException;
import com.dukascopy.api.Period;

public class Logger implements IStrategy {
    @Configurable("Instrument") public Instrument instrument = Instrument.EURUSD;
    @Configurable("Drawdown") public double drawDown = 1000;
    @Configurable("Update log every") public Period updatePeriod = Period.FIFTEEN_MINS;    
    
    private IEngine engine;
    private IConsole console;
    private IHistory history;
    private IContext context;            
    
    public void onStart(IContext context) throws JFException {
        this.engine = context.getEngine();
        this.console = context.getConsole();
        this.history = context.getHistory();
        this.context = context;        
        
        console.getOut().println("Path to log file: " + this.context.getFilesDir() + "\\log.txt");
    }

    public void onAccount(IAccount account) throws JFException {        
    }

    public void onMessage(IMessage message) throws JFException {        
    }

    public void onStop() throws JFException {
    }

    public void onTick(Instrument instrument, ITick tick) throws JFException {        
    }
    
    public void onBar(Instrument instrument, Period period, IBar askBar, IBar bidBar) throws JFException {
        if (period != this.updatePeriod || instrument != this.instrument) return;
        
        double totalDrawdown = 0;
        for (IOrder order : engine.getOrders()){
            if (order.getProfitLossInUSD() >= 0) continue;
            totalDrawdown -= order.getProfitLossInUSD(); 
        }
        if (totalDrawdown >= this.drawDown) {
            logDrawdown(totalDrawdown);
        }
    }
    
    private void logDrawdown(double currentDrawdown)throws JFException{        
        SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        fmt.setTimeZone(TimeZone.getTimeZone("GMT"));        
        try {
            File file = new File(this.context.getFilesDir() + "\\log.txt");
            FileWriter fw = new FileWriter(file, true);
            fw.write(fmt.format(history.getLastTick(this.instrument).getTime()) +  " Current drawdown: " + currentDrawdown + System.getProperty("line.separator"));
            fw.close();
        } catch (IOException e) {
            console.getOut().println(e.getMessage());
        }
    }
}

Thank you for the reply!

As I see a number a Java "libararys?" have been imported for this code, this brings up a question I have been thinkning about for a while.

Is there a list available of all the Java classes that can be imported? And where do they come from? I am used to coding in c++ and anything that gets imported into the code needs to be in the same folder as the source code, or at leat somewhere on my PC. I see none of these java libraries are on my pc however? Seems like I am working a bit in the dark here. Do all those libraries come with Java by default, and were they installed to my pc when I installed your demo, or downloaded the latest java download from Sun?

What if I wanted to add more librarys? For example, the JMatLib library, which has all the functionality of the MathLab program, but is written for Java? Would I simply have to put the library in the Strategies folder?

I am new to Java and still trying to figure out these basics. Thank you.

Oh, BTW, I believe this line:

totalDrawdown -= order.getProfitLossInUSD(); 

should be this:

totalDrawdown += order.getProfitLossInUSD(); 

as drawdowns are already negative, and a negative plus a negative is a positive.

For example, I will need to use the java function Math.max in my code.

How can I know if I can just write "import java.math.*" or If I actually have to go find the library online, download it, and place it in the strategues folder before it will work?

use an IDE like eclipse or netbeans, imports can be done automatically there. so you can see, if you
are using a standard java library or external libraries.

but java.math.* is standard

Thanks Tom,

On the reccomendations of the Java forum at Dream In Code, I started using notepad++. Can I create and compile classes and do imports with Notepad++? Again, the Java world is brand new to me, OOP, for that matter..

So I'm guessing a number of Java classes are standard when you download Java? This is different for me. In the C++ world nothing comes standard, unless you use a C++ IDE, in which case most of them come with libraries built in.

Well I'm currently downloading Netbeans....

Can I compile a JFroex program with it? Seems like I couldn't as the JForex package won't be included with netbeans... I would imagine I would get an error like "can't locate jForex package" or something like that? I gotta say all these hidden semi-unaccesible libraries in Java make it kind of hard to actually know what's going on with your code. I like to be able to see everything, and see the source code for everything.

you need do download the JForexClientLibrary from Dukascopy and extract it. then locate
the libs folder and add all the jars to your project in netbeans.

i always create a lib-folder in my project and copy the jar-files to this folder before including
them into my application.

Sweet! Thank you very much, Tom!

I'm pretty sure the client library you are talking about is here:

https://www.dukascopy.com/client/jforexl ... ibrary.zip

In case anybody is looking for it.