A SMALL TOOLKIT FOR BIG QUESTIONS
Run the numbers.
Understand the tradeoffs.
Simple tools to test assumptions before turning an idea into a decision.
Let time do the math.
Explore a hypothetical savings journey. Change the assumptions and see what happens.
Monthly compounding; contributions at month-end. Constant nominal return, no taxes, fees, or inflation. Hypothetical returns are not predictions and can be negative.
Learn about compounding at Investor.gov ↗Size the risk first.
A simple position-size calculation based on a hypothetical exit level.
Long positions only. Stop orders do not guarantee an execution price. Gaps, fees, and slippage can make losses larger than the budget.
The recovery equation.
A 20% loss needs more than a 20% gain to get back to even.
Required gain = loss ÷ (1 − loss). No additional deposits or withdrawals.
Explore your own datasetTURN WHAT IF INTO A NUMBER
Good questions. Useful tools.
Let time do the math.
Explore how savings, contributions, and compounding work together.
Growth calculator 02Find the story in your data.
Paste a dataset. Explore distributions, correlations, and charts.
Data lab 03Understand the downside.
See the position size behind a risk budget and a hypothetical stop.
Risk calculator