MID : MA(CLOSE,20),COLORFF00FF,DOTLINE;
UPPER: MID + 2*STD(CLOSE,20),COLORGRAY,DOTLINE;
LOWER: MID - 2*STD(CLOSE,20),COLORGRAY,DOTLINE;
VAR1:=CLOSE>REF(CLOSE,1) AND CLOSE>REF(CLOSE,2);
上升:IF(BOLL>REF(BOLL,1),BOLL,DRAWNULL),COLORRED,LINETHICK2;
下降:IF(BOLL<REF(BOLL,1),BOLL,DRAWNULL),COLORGREEN,LINETHICK2;
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