Position Sizer

Calculates an order quantity from account, price, and risk inputs.

When to use

Use it before Order when quantity should be derived from explicit risk sizing rather than a fixed value.

Example

Calculate quantity from account balance, current price, and stop distance, then feed it to Order.

Try it here

Explore Position Sizer

Calculates an order quantity from account, price, and risk inputs.

Exercise steps

1. Change the method from Fixed to Risk based.
2. Inspect the newly required price and stop-distance inputs.

Start lesson

Work from a risk budget

Select Risk based, provide Account Balance and Current Price, set Risk Percent to 1, and choose the source of Stop Loss Distance. For an illustrative balance of 10,000 units, the risk budget is 100 units. With a simple price-distance assumption of 2 units per unit held, an unconstrained arithmetic size would be 50 units. The node's Calculated Size must still respect instrument units, tick/lot rules, available margin and the exact stop-distance semantics. It is a data output, not an Order submission. Connect it to the proposed Quantity input and check Margin Check before the control path reaches Order.

Common problems

Missing or zero risk inputs can produce unusable results. Review units and do not treat the calculated size as a margin approval.

Next steps

Review the generated Parameters, Outcomes, and Data Ports on this page, then open the related guides for the complete workflow.