Position size calculator

Risk a fixed percent of the account between entry and stop. The result is informational — venues still mark the live position differently.

Cash at risk—

Position size—

Notional—

Stop distance—

The calculator is the plan. The journal is the trade.

Once the size is on an exchange, Fibonomy shows mark price, exposure, and the note you wrote — not another spreadsheet.

FAQ

How is position size calculated?

Cash at risk is account size times risk percent. Size is that cash divided by the distance between entry and stop. Notional is size times entry.

Can I trade this size as-is?

No. This is a planning tool. Fees, mark price, and exchange increments still change what you can actually hold.