Elder Impulsion + double EMA + Envelop

Indicator combining Elder Impulsion + double EMA + Envelop.

Changing settings :

Long EMA : periods for the long EMA
Short EMA : periods for the short EMA
Coefficient de canal : envelop narrowing
Settings for MACD Length : don't touch, except if you need to.

Coded with my buttocks, thanks for your indulgence.
Credits at the beginning of the code (thanks to jamiespips, samuel16, idu)