MTFs of basic MT4 indis in the beginning of this thread
i think it's in zip file

PriceActionChanel - same Envelopes: same code, different default settings

MT4 standart Envelopes default settings:

MA_Period=34;
MA_Shift=0;
MA_Method=0;
Applied_Price=0;
Deviation=0.1;
http://www.forex-tsd.com/111944-post650.html