Category Archives for "General"

April 29, 2015

Interviewed on Better System Trader

I was recently interviewed on Better System Trader. Go here to listen to it. He also has some other good interviews with Jake Bernstein and Brent Penfold which I listened to. I need to get around to the Nick Radge interview because I am meeting him next month at the 2015 Australian Technical Analysts Association.

Some quotes from my interview.

There is nothing that will dig at you like trading with real money on the line.

Most of the time huge losses can’t be avoided because they’re overnight gaps you can do nothing about.

The wrong time to be making your plan is in the middle of a trade.


Got questions about the interview? Send them my way here.

As a side note, the site got a makeover because the site was not “mobile-friendly” which Google does not like. If you see any problems or have comments, email me.

Good Quant Trading,

March 25, 2015

Speaking at the 2015 ATAA conference

I will be speaking at the 2015 Australian Technical Analysts Association on May 15 to 17, 2015. My topics are “The development of an S&P500 stock weekly rotation strategy” and “From Internet Article to Trading Strategy: An ETF Monthly Rotation Strategy.” For more information about the conference go here. I am excited to meet some of my readers at the conference.

I will have two free days to explore Sydney before the conference. If you have any suggestions on things to do and see (I will not have a car) or places to eat (from hole-in-the-wall to fancy) or hotel to stay at (want to stay in the heart of Sydney), put them in the comments.

On May 13th, I would like to get together with some of my Australian readers in Sydney. If you are interested in meeting either for dinner or drinks, please contact me. Depending on the size of the group it may just be drinks. Any suggestions on where to have the get together are appreciated. I plan to stay in the heart of Sydney but have not booked my hotel yet.

What is the must eat restaurant in the heart of Sydney? Put it in the comments below.

Good quant trading,

July 14, 2014

Premium Data from Norgate Investor Services Review

5/25/2017: Norgate has closed the beta program at this time which this review is based on. They are aiming for public release in “mid-2017”

I am frequently asked what data provider I use. A year ago my data provider was CSI Data. Then I heard about Premium Data from Norgate Investor Services and the one feature that enticed me to look at them closer: historical S&P500 index constituent data. At that time, I was maintaining the data by hand. Each month I would have to determine which stocks had been added or deleted from the index. I would need to look for name changes in the current and historical list. Not a hard task but time consuming and easy to make mistakes. The thought of not having to do this was very enticing.

This review will focus on US Stocks and AmiBroker integration. Premium data has data for the Australian and Singapore markets, integrate with multiple other platforms and have forex and futures data. For more information go to Premium Data from Norgate Investor Services.

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April 21, 2014

Backtesting is Hard

Why don’t I make more frequent posts? The easy answer is backtesting is hard.

A test has three parts to it. First, coming up with the idea. I have more ideas than I can test. I have a notebook full of ideas. The hard part here is picking one. Second, writing the code and running it. This takes me a couple of hours to a couple of days to do. Writing code is the fun and mostly easy part, though sometimes it can be insanely hard. Third, is verifying the result are correct. It is the last step that can takes days to weeks to do. Then writing the post takes a couple of days.

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April 17, 2014

Ulcer Index: An underutilized portfolio metric

About two years ago, I started using the Ulcer Index as another evaluation metric for portfolio backtests. I like how it captures both drawdown and drawdown length. It helps differentiate similar looking portfolios using the common metrics of Compounded Growth Rate, Share Ratio, and Maximum Drawdown. My plan was to write a blog post about it and then add it to the metrics I show on the blog. The blog Flirting With Models, found through the quant mashup Quantocracy, just made a great post on it which I highly suggest you go read: Looking into the Ulcer Index. They did a great job and saved me a post. I will show this metric on future portfolio tests.

February 24, 2014

Podcast interview on ‘Don’t Talk About Your Stocks’

Last week I was interviewed by Andrew Selby of Don’t Talk About Your Stocks. We covered lots of topics in the 45 minute interview. We covered my trading mistakes, why you need a trading buddy,  matching your trading style to your personality, and many more topics.


If you have any questions from the interview, post them in the comment section of this page.


January 23, 2014

The issues with back testing a short stock strategy

I have been shorting stocks since 2006 using a quantified strategy that has remained relatively unchanged through the years. From 2006 to 2012, the strategy was one of my most consistent and profitable of all the strategies I have traded. I love shorting stocks because it is very hard psychologically, because of that, I believe that there is a good edge there. The test results have always bothered me because of the differences between back tested assumptions that sometimes are challenging to actually reproduce in real-world trading. Then in 2013 my fears became realized and all four fears below really hit me.

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September 8, 2013

Dealing with Broken Arrows

When I buy a stock, I know the edge is for the stock to go up. I know that does not mean every stock is a guaranteed winner. Or that my losses will be small. But every now and then you get what I call a broken arrow. I was in Expedia (EXPE) as it triggered in my SP500 rotation system. It was in a nice up trend, everything looking great.
And then …earnings happened.

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September 8, 2013


My Background

I have been interested in the stock market since 1990. I was fortunate enough to be trading in the late 90’s and got to enjoy those incredible years. Then came the 2000 bear. I tried my hand at day trading but soon discovered it did not fit my personality. It took a long time to realize that trading style must match personality. I turned to building strategies using quantitative methods. What I discovered was, the testing results from most trading methods didn’t hold up as expected. Soon after discovering this I was hired by Connors Research, and from there, my trading knowledge greatly expanded. Larry Connors taught me how to properly look at short term market behavior and how to find edges. I spent nine years looking deeper into indices, stocks, ETFs, futures and options.

Research Set up

I have used AmiBroker, since 2001, as my backtesting platform, into which I feed CSI Data’s stocks database, which includes delisted stocks. The data is adjusted for dividends and capital gains. The data contains the as traded price such that one can use price filters without having to worry about stock-splits. AmiBroker is a powerful platform at a reasonable price. I highly recommend it to anyone looking to get into backtesting. Microsoft Excel and MySQL are tools I use to analyze the output from AmiBroker.

Favorite Trading

Over the years I have traded stocks and ETFs, and options, both on the long side and short sides. My primary methods are reversion-to-the-mean and rotational. These strategies fit my personality and allow me to stick to the strategies even when things are not going well.

Holy Grail Strategy

Every researcher has a Holy Grail strategy they pursue. Mine is the breakout strategy.  I would love to complement the reversion-to-the-mean strategies I trade.

Unexpected Results

The unexpected result is my favorite thing about research. I have added filters to a strategy that I just knew that it would make it better, and then it makes it worse. Or the reverse, when I thought it was crazy to try an idea because it would lose money and it makes money.

Idea Generation

My ideas for what to research often come from my trading. I will see some pattern or the market will do something that makes me curious. Another great source is my trading buddy (which all traders should have), Steven Gabriel. He is a wealth of ideas and always has more than I can test. Last but not least are other traders. Often they will say “did you trying testing XYZ?” And my response is “No, but that is a great idea. Let me test it and get the results to you.”


Most of my posts will be from research I am doing for my own personal trading. Trading ideas from my great friend and trading expert Steven Gabriel are often a wonderful source. Sometimes I will see something on another blog and want to take those results a step further, or apply them to a specific stock universe. Every now and then I will post results that did not work out. Maybe it will trigger new ideas to test and improve the results. Sometimes a simple tweak transforms a poor idea to a winning one. Understanding what does not work is every bit as important as knowing what does. And if my readers have good ideas, I can verify and validate them.