This approach goes long or short each asset based on its own past returns. If the trailing return is positive the model buys; if negative it sells, forming a diversified trend‑following portfolio. 
Signals are evaluated monthly using one‑year lookbacks and positions are equally weighted across assets. 
 
- Data: Monthly total returns for each asset. 
 
- Entry: Long when 12‑month return > 0; short when < 0. 
 
- Exit: Reverse when the signal changes sign. 
 
- Instruments: Broad set of futures or ETFs. 
 
- Risk: Volatility scaling and diversification.