The 2 Pole Butterworth Filter was created by John Ehlers (Cybernetic Analysis For Stocks And Futures pg 192) and this is one of his many filters that cuts out the noise and follows the price very closely. I recommend combining a 2 pole and 3 pole system of the same type of filter. Buy when the indicator line is green and sell when it is red.
Let me know if there are other indicators you would like to see or if you want something custom done!
Release Notes
fixed an error in the code. thanks to @midtownsk8rguy for bringing it to my attention
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