Percentage sizing allocates a fixed share of capital to every trade. Unlike risk-based, it doesn't normalize by stop distance - two trades with very different stops will still use the same percentage of capital.
Shape
"position_sizing": {
"method": "percentage",
"fixed_pct": 10
}Params
- fixed percent - percent of capital per trade.
When to pick this
- Buy-and-hold-style strategies where stops are wide or absent.
- Spot accumulation strategies that aren't using leverage.
- Multi-symbol baskets where consistent capital allocation matters more than consistent risk.
Pitfalls
- Dollar risk varies by trade. A wide stop trade risks more capital than a tight stop trade at the same percentage size.
- Less useful for stop-driven strategies - use risk_based instead.