Its called Dr. Copper because its said to have a PHD in economics. Here is a monthly view of the $price of copper from 1980 to present. It seems evident that the price moves in a 7 or 8 year cycle, trough to trough – or at least it has for the last 4 cycles. Three of the cycles were left translated (LT) – that is, the price rose for a shorter length of time in the cycle than the decline. In the 3 LT examples the price climbed for about two years, then gradually declined to the 7 or 8 year low. The outlier is the right translated period from ’02 until ’09 when the price climbed for 6 years and then collapsed into the 7 year low.
That brings us to the present cycle that started in January 2016. The question is – has the price of copper peaked? For clues we might look to on balance volume (OBV) as compared to the previous cycle, and to MACD as compared to all previous cycles. Both suggest copper has already peaked at year 2 and is declining into a cycle low due in January 2023.

$Copper Monthly

$Copper Monthly with $Gold overlay
What is interesting, and perhaps a little unsettling, is the correlation with the $price of gold. Its not perfect, but there is a correlation.