- Is the calculator really free?
- Yes. No account, no email, nothing stored on the server. The page does the math in the browser; the only outbound call is fetching the current price.
- How accurate are the prices?
- Live but delayed by roughly 15 minutes via Stooq's free quote feed. Good enough for forward-only position sizing; not a substitute for your broker's live ladder when entering the trade.
- What math does it use?
- Position size = (capital × risk %) ÷ (entry × stop %). The scale-out plan maps R-multiples to absolute dollar targets so you can pre-place exits before the trade goes on.