Use FYNX on iPhone to plan position size, risk-to-reward, ATR stops and daily risk limits before a trade.
Connect the inputs
Bring together account balance, a chosen risk percentage and the distance to your stop. Position sizing turns those inputs into a plan you can review before entering a trade.
Keep the assumptions visible
FYNX brings position sizing, risk-to-reward presets, ATR stops and daily risk limits into the same toolkit. A calculation depends on its inputs. Fees, slippage and market conditions can change the realized result.
Try a calculation on the web
A $10,000 account with a 0.5% risk budget produces a $50 planned risk amount before costs. The web position-size calculator lets you explore how a stop distance changes the position.
Open position-size calculator ↗
FYNX is free to download. Some tools and analytics require an Apple subscription; review current availability and pricing in the app.