Mechanical versus Discretionary Systems

After finally importing 2 more years of intraday data, my Dooku trading system has failed to backtest well using 4 years of intraday data.  Where does this leave me?  In a word, LOST.

I need to investigate furthur the recommended methods to backtest a trading system.  Of course I realize that past results don’t guarantee future results but I need to understand it more.  1 question I need to ask myself is:  Will my system will be totally mechanical or a discretionary system?

Here are some good pros and cons of both:

Mechanical systems

Advantages 1. This kind of system can be automated and backtested efficiently. 2. It has very rigid rules. Either, there is a trade or there isn’t. 3. Mechanical traders are less susceptible to emotions than discretionary traders. Disadvantages 1. Most traders backtest Forex trading systems incorrectly. In order to produce accurate results you need tick data. 2. The Forex market is always changing. The Forex market (and all markets) has a random component. The market conditions may look similar, but they are never the same. 3. A system that worked successfully the past year doesn’t necessary mean it will work this year.

Discretionary systems

Advantages 1. Discretionary systems are easily adaptable to new market conditions. 2. Trading decisions are based on experience. Traders learn to see which trading signals have higher probability of success. Disadvantages 1. They cannot be backtested or automated, since there is always a thought decision to be made. 2. It takes time to develop the experience required to trade successfully and track trades in a discretionary way. At early stages this can be dangerous.

Popularity: 3%

Trading System signals

I still have two short GBP/USD and EUR/USD positions from last week that were opened due to signals that my Dooku trading system generated.  The market hasn’t been doing much since then yet I’m sitting on an unrealized profit of $500. 

Yesterday I stated that my trading system had a profit target of 225 pips and a stop loss of 75 pips.  Though these are the stops and limits I place on each trade, my trading system can generate reversal signals that prevent my profit target from ever being hit.   The most I can lose on any given trade is 75 pips.  Generally if the trade moves at least 50 pips in my direction, I’m usually guaranteed that I will profit from at least these 50 pips.  It’s when it moves above this when I have a chance of realizing the 225 pip profit target as long as my trading system doesn’t generate a reversal signal.  In backtesting, my maximum profit target was not hit as often as my maximum stop loss but forward testing should give me more insight on how this trading system will perform in the long run.

I’ve been busy trying to import 5 years worth of intraday data into Amibroker for backtesting.  I know I was talking up Amibroker like it was the greatest thing since sliced bread but 1 drawdown is the fact that they use flat files for historical data as opposed to an optimized database.  What this means is that as more and more data is added, the slower and slower it is to import.  I figured the import of 5 years of 1 minute data for 10 currency pairs will take about 2 days for a single cpu pc at 100% utilization.  Unfortunately I don’t have a dual-cpu or dual core system right now though I’m very tempted to buy one. 

Popularity: 3%

Dooku Forex Trading System

I started to work on multiple trading systems over the last week or so and realized that I was falling into the same trap of trying to do too many things at once.  I decided this weekend to work on my first trading system more.  The first thing I did was give it a cheesy name so that I can distinguish it from all the others.  I have named it Dooku.  You can figure out on your own where I got this one from. 

This system was previously being tested on hourly charts with a risk reward of 1:1.  It tested well with a 50 pip stop loss and a 50 pip profit target.  The first thing I wanted to do was to get the risk reward to 3:1.  I successfully accomplished this and Dooku tests very well on the hourly charts with a stop loss of 75 pips and a profit target of 225 pips.  

I will forward test this system this week and going forward to see how it performs.  From my backtesting, it has never had a losing month.  I will forward test this with real money and 1 lot each trade.  I will use a 75 pip stop and a 225 pip profit target.  I will trade only the GBP and EUR.  From my calculations, this system will generate an average of 20 signals a month for each currency pair.

Popularity: 4%

Developing a systematic approach to trading

After days and days of backtesting, I think I have found a simple system that works for me.  I backtested it over the last 5-6 months on the EUR/USD 60-minute charts.  Of course I understand that there are no guarantees that this system will work well in the future too.  But it does feel really good to have designed a system that I can use going forward.  My goal over the next month or so is to trade religiously using this system and being the gambler I am do so using my live trading account.  It actually feels really great to have a system that is going to generate long, short, cover, and sell signals right on my charts.  Here are my backtested results:

 

 

 

 

 

Popularity: 3%

A Forex Trader Speaks His Mind

I’m posting an email I received from a fellow participant of Raghee Horner’s webinars today.  He has been utilizing Raghee’s methods for the last year and goes into the successes and failures he has had with them.  Keep in mind that he is a beaten down trader who started out with $30,000 and now has $3000 left.  I don’t necessarily agree with everything he says.  I don’t think because 1 person is unsuccessful at something that no one else has a shot.  One of his final sentences is "Do not think you’re going to realize your dreams by day trading."  I don’t believe this and won’t believe this.  I feel like his story will be beneficial:

I would say her setups happen quite a bit if you scan all the pairs. I am not good at position trading or sitting on trades, so I found it really hard to utilize the large time frames. I like to be in and out, a day trader. Her system is like any system, it gives you a method for entries and exits. Each entry has 50% chance of moving in your direction and her method gives you a slight edge or helps you gain a higher probability of being on the winning side. No trading system is consistently profitable, your either on the winning side or your not. The key is to get in when your system tells you to, act on your systems signals, utilize stops or get out as soon as the trade tells you it’s not going in your direction.

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Popularity: 6%