OPEN-SOURCE SCRIPT
Updated Implied SPX from ES

Implied SPX from ES Futures (ETH)
Description:
This script calculates the implied SPX index level based on real-time ES futures pricing during extended trading hours (ETH). It uses the spread between the previous day’s ES and SPX RTH closes to adjust for fair value and intraday divergence.
📈 Features:
Tracks current ES price vs. yesterday's RTH spread to estimate SPX
Useful for SPX options traders who want to monitor synthetic index levels during ETH
Ideal for assessing SPX movement when the cash market is closed
This tool is especially helpful for those trading SPX index options overnight or seeking to align SPX levels with ES futures movement.
Description:
This script calculates the implied SPX index level based on real-time ES futures pricing during extended trading hours (ETH). It uses the spread between the previous day’s ES and SPX RTH closes to adjust for fair value and intraday divergence.
📈 Features:
Tracks current ES price vs. yesterday's RTH spread to estimate SPX
Useful for SPX options traders who want to monitor synthetic index levels during ETH
Ideal for assessing SPX movement when the cash market is closed
This tool is especially helpful for those trading SPX index options overnight or seeking to align SPX levels with ES futures movement.
Release Notes
edited to add user should be on an ES futures chart for accurate readImplied SPX from ES Futures (ETH)
Description:
This script calculates the implied SPX index level based on real-time ES futures pricing during extended trading hours (ETH). It uses the spread between the previous day’s ES and SPX RTH closes to adjust for fair value and intraday divergence.
📈 Features:
Tracks current ES price vs. yesterday's RTH spread to estimate SPX
Useful for SPX options traders who want to monitor synthetic index levels during ETH
Ideal for assessing SPX movement when the cash market is closed
This tool is especially helpful for those trading SPX index options overnight or seeking to align SPX levels with ES futures movement.
Open-source script
In true TradingView spirit, the creator of this script has made it open-source, so that traders can review and verify its functionality. Kudos to the author! While you can use it for free, remember that republishing the code is subject to our House Rules.
Disclaimer
The information and publications are not meant to be, and do not constitute, financial, investment, trading, or other types of advice or recommendations supplied or endorsed by TradingView. Read more in the Terms of Use.
Open-source script
In true TradingView spirit, the creator of this script has made it open-source, so that traders can review and verify its functionality. Kudos to the author! While you can use it for free, remember that republishing the code is subject to our House Rules.
Disclaimer
The information and publications are not meant to be, and do not constitute, financial, investment, trading, or other types of advice or recommendations supplied or endorsed by TradingView. Read more in the Terms of Use.