%R
Williams %R (%R, Williams� Percent Range) is a momentum indicator that fluctuates between 0 and -100 and displays overbought and oversold levels.
To use the indicator, the WilliamsR class should be used.
Calculation
The formula for calculating the Williams� Percent Range indicator is similar to that used for calculating the Stochastic Oscillator:
%R = - (MAX(HIGH(i - n)) - CLOSE(i)) / (MAX(HIGH(i - n)) - MIN(LOW(i - n))) * 100
where:
CLOSE(i) - today's closing price;
MAX(HIGH(i - n)) - the highest maximum of the past n periods;
MIN(LOW(i - n)) - the lowest minimum of the past n periods.
The value of n is set as the indicator parameter.
