Can you apply an exponential moving average channel?  [SOLVED]

From what i see in the trial, you can only apply a channel constructed by using a simple moving average, but the whole thing is you need your channel to react properly to price changes, so you need an exponential moving average channel.
Is it possible??

Please try XAverage( Price, Length ) to make an exponential moving average channel. Or please send me the indicator which you want to make exponential.