Markets.

The spread is only the beginning.

Gross = (sell bid − buy ask) × quantity. Estimated net subtracts both fees and a 0.02% slippage buffer per leg. Quantity uses available virtual cash (starting capital $10,000.00, split between exchanges), capped by $250.00 spend including buy fees, top-of-book liquidity, and prepared sell inventory. Binance fee 0.10% · OKX fee 0.10%: estimates until verified against your fee tiers. Public REST polls every 15 seconds while visible; quotes expire after 30 seconds or a failed verification. Binance bookTicker has no event time, so request time is a conservative freshness bound; OKX uses exchange time. Estimates are not guaranteed fills. Virtual quantities are not validated live lot sizes. No real orders are placed. USDT is shown in USD units, not converted at a live FX rate.