Free calculators
The maths the desk uses. Free to use.
Size a trade from its stop, find where leverage closes you out, see how deep your drawdowns can go and what your edge is worth. No sign-up, nothing to install, and your numbers stay in your browser.
Position size
Size any trade from its stop, fees and leverage included.
Open → 02Risk of ruin
Thousands of runs of your edge: how deep the drawdowns go.
Open → 03Expectancy
What a win rate and a reward to risk are really worth.
Open → 04Compounding
What a weekly goal turns into, and what it asks of you.
Open → 05Liquidation price
Where leverage closes you out, and the most a stop allows.
Open → 06Average entry
Several buys into one average, break-even and profit.
Open → 07Drawdown recovery
The gain it takes to win back a loss, and how long.
Open → 08Profit and loss
What a trade made, after fees, and the return on margin.
Open →Why these
Most accounts are not lost to bad ideas. They are lost to size: a trade too big for its stop, a run of losses nobody planned for, a goal that needed more risk than the edge could carry. These answer those questions before the market does.
They use the same conventions as The Print Room's desk: 1R is the distance to the stop, a loss at the stop is −1R, and the account moves by R times the percent risked. Every close on the desk is on the public record, losses included.
For education. Not financial advice.