Truck and Barter attributed this chart to Thomas Friedman (he who proved the flat earth), who apparently made the following comment:
And what you basically see is this relationship where as the price of oil goes down the pace of freedom goes up in countries like Nigeria, Iran and Russia, and as the price of oil goes up the pace of freedom goes down, and the lines actually cross in all of these graphs
Sadly, his most amazing finding is the least interesting: given two lines drawn on two different axes, measured in two different units (one in dollars, the other in index numbers), the crossovers are merely an artifact created by the chart designer. Just changing the scale, or shifting the lines vertically, will cause this amazing feature to immediately vanish.
Also see related post here