Whatever your opinions are about the concept of back-testing, there are few better ways to build a trading system than through the back-testing of historical data.

Back-testing allows us to answer critical questions like ‘how many positions should I hold in a portfolio?’, ‘how much risk should I take?’ or ‘how effective was this strategy in the past?’ Read more »


Stocks don’t move in a single direction and if you have enough reason to believe that share prices are about to go down, then there are ways to profit from betting against them. However, betting against stocks is much trickier compared to going long and there are several factors to consider before you short. Read more »


Trading systems are not only good for making money in financial markets but they are also extremely useful for learning. Unfortunately, trading systems often get discarded early on after a couple of poor back-test results.

Sometimes it is better to improve an existing model that needs work than to start afresh with a totally new system. In this article I look at 21 ways you might be able to improve on your existing trading system: Read more »