Systematic Trading is a process that follows a system of rules, often called rules-based system. Systematic trading is a process the uses indicators to generate signals for entry, exit, and size. Systematic trading is usually considered more automated and mechanical, so systematic trading can be computerized trading systems.
Systematic trading definitions and examples from other sources:
Systematic Trading: A method of trading which follows a mechanical set of rules, normally using computer models, producing entry and exit orders to form trading decisions. – IASG.com
Systematic Trading utilizes computer models, mainly based on technical analysis of market data or fundamental economic data, to identify and make trades, with limited manager intervention. – Morningstar