Cramer turned to the help of Carley Garner, a technician and co-founder of DeCarley Trading. Looking at the long-term chart of U.S. oil production going all the way back to the 1920s, Garner pointed out that the U.S. has doubled its monthly oil output since the lows of 2008 and is nearly back to its peak levels set back in the 1970s. Thus, unless some sort of unforeseen powerful even occurs, she believes that the oil market will be over-supplied for a long time.