<P> This formula can also be expressed in technical analysis terms as follows, showing how the EMA steps towards the latest datum point, but only by a proportion of the difference (each time): </P> <Dl> <Dd> EMA today = EMA yesterday + α (price today − EMA yesterday) (\ displaystyle (\ text (EMA)) _ (\ text (today)) = (\ text (EMA)) _ (\ text (yesterday)) + \ alpha \ left ((\ text (price)) _ (\ text (today)) - (\ text (EMA)) _ (\ text (yesterday)) \ right)) </Dd> </Dl> <Dd> EMA today = EMA yesterday + α (price today − EMA yesterday) (\ displaystyle (\ text (EMA)) _ (\ text (today)) = (\ text (EMA)) _ (\ text (yesterday)) + \ alpha \ left ((\ text (price)) _ (\ text (today)) - (\ text (EMA)) _ (\ text (yesterday)) \ right)) </Dd> <P> Expanding out EMA yesterday (\ displaystyle (\ text (EMA)) _ (\ text (yesterday))) each time results in the following power series, showing how the weighting factor on each datum point p, p, etc., decreases exponentially: </P>

What does current period of mobile data mean