Here is another chart that may make you think as well. This is the COAL/NAT GAS Ratio chart that shows the trend between them with NG overlaid below in Lt.Blue. With industry switching back and forth depending on costs it is something you may wish to explore. You can see COAL started to underperform NG in late April. And in mid June the Modified MACD broke down below the 0 line clearly for the 1st time in two years. Just food for thought.