PRUVIQ trading tools · all tools
Position Size Calculator
Sizes a position from the only number that matters first: how much you're willing to lose. Quantity = risk amount ÷ stop distance (Van Tharp lineage) — leverage affects margin, not risk.
Risk amount100 USDT
Quantity20
Notional size2,000 USDT
Margin required400 USDT
Stop distance5%
Convention: risk = balance × risk% · qty = risk ÷ |entry − stop| (Van Tharp lineage). Leverage only changes margin required — risk is set by stop distance alone. Fees/slippage excluded. Educational, not advice.
Related: break-even win rate · backtest with real fees