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)