Contact

Check these first

Each calculator has a guide and FAQ at the bottom of its page: the Simulator, the Kelly Calculator, and the Position Size Calculator. How we handle your inputs and email is explained in our Privacy Policy.

Reporting a calculation issue

It helps to include your browser, the steps that led to the problem, the inputs you used, and — for the simulator — the seed shown in the results. Example amounts are fine; you don’t need to share your real account size.

Please don’t send account numbers, passwords, exchange API keys, or anything that identifies you. If you attach a screenshot, check that no personal information is visible.

What we can help with

We can help with calculation errors, accessibility, and explanations on this site. We don’t provide advice on buying or selling specific investments, and we can’t promise any return.