Closed beta. Last updated 2026-08-31.
The trading sandbox is paper trading. No real money is involved, no orders reach any real market or broker, and no account of yours is ever connected to a venue. Results shown are simulations, and a simulation cannot capture everything about real execution, slippage, liquidity, partial fills, outages and your own behavior under pressure are all different when money is genuinely at risk.
Prices come from third-party sources. They may be delayed, incomplete, adjusted, or simply wrong, and they are provided for personal, informational use. Do not rely on this data for any decision that matters. If two sources disagree, we show you which source you are looking at rather than pretending there is one true number.
Three kinds of prices appear on this site, and we label which one you are looking at. The charts, price board, portfolio, and the sandbox page's market board use public reference sources during the beta: delayed or best-effort feeds meant for looking, not for trading decisions, and they may change or fail without notice. The sandbox streams from a market-data account you hold, under your own key and your own provider's terms (see the terms). The API demo on the front page trades BTCX-USD, a synthetic instrument: a series generated by a published generator from a published seed, loosely anchored to a rounded recent Bitcoin level so it looks plausible, and never observed on any market. It is not a price, not a forecast and not a performance claim; its future days are published in advance, so the demo shows a rules engine executing honestly against a known series, not predicting one. Everything needed to reproduce it is at /demo.
Backtests, replays and historical statistics describe what already happened. They do not predict what will happen. A strategy that performed well in a simulation can lose money in reality.
You are responsible for what you do with anything you see here. We accept no liability for losses arising from use of this software or its output.