Turtle System 1

Turtle Trader system is a famous trend-following trading methodology created by Richard Dennis and his partner William Eckhardt in the early 1980s.

The backstory is almost as interesting as the system itself:
Dennis believed trading success was a skill that could be taught, while Eckhardt thought it was more about innate talent.
To settle the debate, they recruited a group of ordinary people — with little to no trading experience — and trained them in a simple rules-based strategy. These students became known as the "Turtles".
The system focused on trading breakouts in futures markets (commodities, currencies, bonds, stock indices) with strict risk management.

System 1 (Short-Term)
Entry: Buy when price breaks above the 20-day high. Sell short when price breaks below the 20-day low.
Exit: Opposite 10-day breakout (i.e., sell long positions if price breaks below the 10-day low).