About StopSize
Know the trade. Know the risk.
The problem this solves
Most trading education is either a wall of jargon with no numbers, or a calculator with no explanation of what the numbers mean. StopSize was built to close that gap: every calculated result links to the concept behind it, and most concepts carry a working calculator inside their own explanation.
The idea is a simple loop — learn a concept, understand it by changing the inputs, calculate it on your own numbers, then follow the link to what comes next.
What's here
- A full risk calculator covering position size, exposure, potential profit and loss, and risk/reward — for long and short trades.
- An interactive dictionary of 135 trading terms, each with a plain-language explanation, common mistakes, and — for many terms — a live tool built into the page.
- A short knowledge check on the relationships that actually decide trading outcomes.
No account, no gate
The calculator and the dictionary work immediately, without signing up. Saved scenarios and quiz progress live only in your browser for the current session — see the Privacy Policy for the specifics.
What this is not
This website provides educational information only. It is not financial, investment, or trading advice.