Quantitative Trading - Advantages and Disadvantages

Advantages

Quantitative trading has many advantages over the discretionary approach of trading. 

• The performance of a quantitative strategy can be tested with historical market data. This process is known as backtesting where we test the strategy using historical data to help us determine if the strategy is likely to be profitable in the future. 
• The automation of the strategy is more efficient as there is no need for an individual or a team to constantly monitor market prices or news. 
• Traders and investors have gained more computational power to perform tasks that require high volumes of data and also allow them to have more accurate calculations of position sizes and risk management.
• This computation power allows execution of certain types of strategies that would be impossible for humans to execute by themselves such as high-frequency trading strategies that triggers orders in less than one second using order book information. 
• All these things are not possible in a discretionary world where traders are unable to continuously compute risk and monitor the market. 
• The quantitative approach to trading also gets rid of emotions that can alter the course of transactions.