Your simulated account runs on Volumetrica. You chart and trade it with Deepcharts or TradingView; TradingView is currently in beta at Volumetrica. Use it in the browser from your dashboard, or install the Volumetrica desktop application and sign in with the same details.
Live prices for the CME, NYMEX and COMEX contracts you can trade are included in your subscription. The positions are simulated; the prices are real.
Your limits are applied on the platform and read back before trading opens. The rules are enforced against the equity the platform reports to us, not against anything your own software shows.
This article is a summary. Your signed Plan and Rules Snapshot, the Trader Agreement and the Payout Policy govern where they differ.