There are many variations and styles you can choose, and don’t forget that similar styled systems can be traded on different parts of the market for diversification
Here’s a brief breakdown of what I do
ASX
Growth Portfolio Trend following Small Caps
WTT: Trend following Micro caps
ASX Momo: Momentum Large caps
ASX Momo PLUS: Momentum Small caps
US
HFT:Multi day mean reversion Russell 1000
US Momo: Momentum Russell 1000
DTVI: Momentum Nasdaq
ETF Diversifier: Broad portfolio of sector/index/other ETFs
All Weather
US: Static portfolio of 6 ETFs 3x Growth 3x Defensive
ASX: Dynamic portfolio of 11 ETFs 6x Growth and 5x Defensive