The hard-won mantra "cut your losers and let your winners run" is well known in investment circles. Unfortunately, it is rarely followed by the majority of investors who are prone to a number of behavioral biases which limit total returns of their portfolios. These biases create persistent patterns in financial markets which can be monetized with algorithmic trading strategies.
Non-discretionary systematic trading strategies are often called "risk factor" or "risk premia" strategies. The number of these factors is very large but the most commonly known ones are Momentum, Value, Carry, and Quality. There is already