STOCKHOLDERS' EQUITY (Details 1) (USD $)	12 Months Ended		72 Months Ended
STOCKHOLDERS' EQUITY (Details 1) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012
Notes to Financial Statements
Weighted average fair value of options granted	$ 0.71	$ 0.71	$ 0.14
Dividend yield	0.00%	0.00%	0.00%
Weighted average risk-free interest rate	2.13%	2.13%	1.43%
Weighted average expected volatility	91.00%	91.00%	122.00%
Expected life in years	5 years	5 years	5 years
Weighted average fair value of common stock	$ 1	$ 1	$ 0.19

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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Renewable Fuel Corp 10-K