Mixed trading systems are combinations of manual systems that are executed by human traders and automatic systems that are executed by algorithms. This type of trading system may be powerful if it manages to catch the best from each of the two types of systems. However, it may also introduce a greater risk of something going wrong by complicating the trading process. A major benefit of using a mixed system is that it allows for the trader to intervene in situations where the trading robot is obviously not making the best choice. This could for example mean that the trader takes over and trades manually during periods of unusually high volatility, such as during news releases.