Originally Posted by igorad

Some time ago I had dispute with MQ concerning SMMA because their SMMA is Wilder MA in fact:
Wilder = Wilder[1] + 1/Period*(Price - Wilder[1])
Correct formula for Smoothed MA is:
SMMA = (Sum[1] - SMMA[1] + Price) / Period,
where
Sum[1] = SMA[1]*Period
SMA - Simple MA.