This chart shows one of the culprits for many of the food riots raging throughout the world at this time. The price of rice has risen from $11 to nearly $21 per bushel since the middle of 2007. This is the daily chart. Bullish trend reinforcement in the past few days seems to suggest that prices are amplifying their upward movement. Is it any wonder people are worried that they won't be able to buy food to eat?