SAK-MPI: Stochastic & RSI

Description : This SwissArmyKnife - MultiPurposeIndicator allows user to modify the conventional indicator smoothing method Stochastic(SMA)/RSI(RMA) to one of filtering tools proposed by John F. Ehlers .
Details of each filtering type can be read in Ehlers Technical Papers: Swiss Army Knife Indicator,

I'm still very new with Digital Signal Processing (DSP) concept and this is my first attempt to help visualize one of Ehlers tools and its practicality (Read: Its experimental).
Any ideas to further improve this indicator are welcome :)

Disclaimer:
I always felt Pinescript is a very fast to type language with excellent visualization capabilities, so I've been using it as code-testing platform prior to actual coding in other platform.
Having said that, these study scripts was built only to test/visualize an idea to see its viability and if it can be used to optimize existing strategy.
While some of it are useful and most are useless, none of it should be use as main decision maker.