This is the Current Market Capitalization and Historical Chart of Gold
There might be discrepancies in the future in the current market cap of gold due to the number of gold ever mined which is always increasing, so as to update it when necessary, you can go and check the site: "gold.org/goldhub/data/how-much-gold" and edit the amount of tonnes on the settings of this indicator
リリースノート
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Same Script, just updating Name, to more easily be found