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The disciplined trader's calculators

Free, instant, no sign-up. Size your risk, measure your edge and prepare for your prop firm challenge.

Position size calculator

How much to risk on this trade, to the cent.

The probability of blowing up your account, simulated.

Does your system make money over the long run?

Your odds of passing FTMO, Topstep & co — quantified.

The week's high-impact releases, by currency.