crude oil

Here's a link to the ChartSchool documentation on symbols.

http://stockcharts.com/docs/doku.php?st=what+symbols&id=data

Basically they are both futures contracts;

- $WTIC is the continuous contract of light crude oil
- ^CLZ14 is the Dec 2014 contract of light crude oil

If you type in ^CL into the symbol search box you can see the whole list of available monthly contracts.

^CLF15 Light Crude Oil - Jan 2015 (EOD)
^CLG15 Light Crude Oil - Feb 2015 (EOD)
^CLH15 Light Crude Oil - Mar 2015 (EOD)
^CLK14 Light Crude Oil - May 2014 (EOD)
^CLM14 Light Crude Oil - Jun 2014 (EOD)
^CLN14 Light Crude Oil - Jul 2014 (EOD)
^CLQ14 Light Crude Oil - Aug 2014 (EOD)
^CLU14 Light Crude Oil - Sep 2014 (EOD)
^CLV14 Light Crude Oil - Oct 2014 (EOD)
^CLX14 Light Crude Oil - Nov 2014 (EOD)
^CLZ14 Light Crude Oil - Dec 2014 (EOD)