Some trading systems have only marginal profitability, and trading implementation costs (commission, spread, and slippage) can be the difference between profitability and making a loss. With the easy availability of modern electronic brokers, and fully-automated trade processing and
execution, it is definitely worthwhile looking for a very low cost way to implement your trading system. High commission, wide spreads, and large amount of slippage can be reduced considerably simply by carefully choosing a broker. This can be the difference between a system
(especially a high frequency one) being useable or not. Paying too much for trade implementation is an avoidable way to lose money.
In order to compete at the highest level in the trading business and be one of the few truly successful participants you must be well-educated about what you are doing. This does not mean having a degree from a well-respected university – the market doesn’t care where you were educated.
Being well-educated means that you have thoroughly researched and tested your trading ideas and know why your trading system worked in the past and is continuing to work now. It means understanding all the technology and applications that your system needs to perform accurately.