HELLO TO ALL, I DRAFTED THIS INDICATOR BASED ON A MEDIUM EXPONENTIAL AT 21 PERIODS + ATR, I HIGHLIGHTED WITH A GREEN BAND A POSSIBLE ZONE OF PURCHASE IN EXCESS OF THE PRICE, PLEASED THAT ALL THE BAR SETUP YOU ARE COMPLETELY OUTSIDE THE BANDS
ATR=AverageTrueRange[21](close)*2.236
M=ExponentialAverage[21](close)
//DEFINIAMO IL CANALE
MMAX = (M + ATR)
MMIN = (M-ATR)
RETURN M AS "MEDIA", mmax as "MEDIAMAX",MMIN AS"MEDIAMIN"