Pastor Williams says the elite gauge the state of the economy via the copper market. This is why copper is listed in these charts. However, the currency of the world is still OIL and this is why oil is listed in these charts. Gold is inherently linked to oil. Please see the following rule of thumb:
As of 18th August 2012, Brent Crude oil price was $116.96 a barrel. Gold was $1615.705 an ounce. Historically a barrel of Brent Crude has averaged 7.2% an ounce of gold over the past decade. On this basis oil should have been $116.33 a barrel. Therefore oil was averaging 7.2% an ounce of gold.