The Generalized DEMA moving average. Double exponential smoothing is applied to a price, taking into account the effect of the secondary smoothing.

The indicator has three input parameters:

• Volume factor (in percent) - secondary smoothing effect factor, in percent
• Period - calculation period
• Applied price

GD = (1.0+Volume factor) * EMA1 - Volume factor * EMA2  

EMA2 - EMA(EMA1, Period)  EMA1 - EMA(Applied price, Period)