N:=26; P:=2; MID := MA(CLOSE,N); UPPER:= MID + P*STD(C,N); LOWER:= MID - P*STD(C,N); BOLLWIDTH:(UPPER-LOWER)/MID,colormagenta; BOLLWIDTHSPEED:BOLLWIDTH/REF(BOLLWIDTH,1)-1;
看股吧 公式 www.kanguba .com