This is the fastest route and the one that gets read. Please include the page you are writing about and, where relevant, the contract specification you are comparing against.
What to write about
- A calculation that disagrees with your exchange's contract specification
- A contract whose multiplier or tick size is missing from the example presets
- A page that fails to load or renders incorrectly on your device
- A feature request — a calculator for a specification the site does not cover yet
- Advertising and licensing enquiries
What this address cannot help with
It is not a trading helpline. Questions about whether to take a specific trade, which contract to hold, or what a position should be on a specific account cannot be answered here — not because the answer is difficult, but because the site does not give trading advice. See the disclaimer for detail.
Response times
Corrections to calculations are looked at first and usually answered within a few days. General enquiries take longer. If you have reported an error and not heard back, the fix may already be live.