Size the loss, not the ego
Professional risk framing starts with one question: if this stop hits, how much of my account disappears? Position sizing answers that before you click buy or sell.
One percent risk on a $10,000 account is $100. If your stop is 25 pips and each pip is worth $10 on a standard lot, a full lot risks $250 — too much. The math forces smaller size.
This calculator teaches the formula. It does not know your edge, your broker spreads, or your emotional state. Use it to learn discipline, then paper-trade before risking capital.