ElPrimero,
Beautiful charts!
I only know how to read the PRB SP curve...but the rest? could use some tutoring or home schooling from experts.
I am looking for some sign that PRB SP is breaking out of its under-valuation, as a result of potentially higher POG, or otherwise (e.g. market sentiment toward PRB. Giving us at least $50/oz Au in the ground would be nice).
goldhunter