How to do BollingerStudy with EMA?

[shaster]

Currently the BollingerStudy() only take length, source, stand-deviation as parameters, but how can I use EMA instead of SMA for the data source?

Thanks.

[ACM]

shaster
The machannel2.efs which is posted here can compute the Bollinger Bands based on various types of moving averages. Set the bands to be based on Std Deviation and in the Value field apply the required number of deviations
Alex