Data basis, updates & coverage

What the page data includes

SmartTrace brings options chains, trades/order flow, prices, and model calculations into one interface. Coverage is fixed at approximately 350 U.S. stocks and ETFs, including major large-cap stocks, options-active names, and index and sector ETFs such as SPY, QQQ, and IWM. Available fields and historical ranges vary by product page and data status; rely on the labels, filters, and timestamps shown on the page.

Update timing and delays

Different data types update at different rates. Quotes and trades can change quickly, while OI generally updates according to the exchange publication schedule. A trade made today therefore does not immediately change the visible OI. Connection, refresh, and snapshot indicators in the interface are important evidence of data freshness.

Limits of model estimates

Greeks and Exposure values such as Gamma, GEX, and Delta are model estimates based on price, volatility, time, and contract information. The platform cannot observe every participant's true net position, hedging frequency, or complete multi-leg portfolio, so model output should not be treated as confirmed dealer order flow.

Pre-use checklist

• Confirm the symbol, expiry, strike range, and page filters.
• Confirm the update time, whether the market is open, and whether any data-connection notice is present.
• Distinguish raw trades, OI, and model-calculated values; do not treat them as the same type of evidence.
• Around earnings, macro releases, and expiry, reduce your reliance on a static snapshot.