OPEN-SOURCE SCRIPT
Correlation Heatmap with Relative Strength

Why the error happened:
In Pine Script, strings are joined using +. My previous draft had a typo that looked like standard1 - "-" + standard2. The compiler saw the minus sign (-) and tried to do math on words, which is like trying to subtract "Apple" from "Banana." Replacing it with standard1 + "-" + standard2 fixes the ticker ID generation.
Would you like me to add a tooltip that explains how to read the Pearson correlation values for anyone who downloads your script?
In Pine Script, strings are joined using +. My previous draft had a typo that looked like standard1 - "-" + standard2. The compiler saw the minus sign (-) and tried to do math on words, which is like trying to subtract "Apple" from "Banana." Replacing it with standard1 + "-" + standard2 fixes the ticker ID generation.
Would you like me to add a tooltip that explains how to read the Pearson correlation values for anyone who downloads your script?
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.