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{P1=3，P2=7，P3=20，P4=60，N=20，P=0.1}

MA_P1_:MA(CLOSE,P1);

MA_P2_:MA(CLOSE,P2);

MA_P3_:MA(CLOSE,P3),LINETHICK2?;

MA_P4_:MA(CLOSE,P4);

MID :  MA(CLOSE,N),LINETHICK2??;

UPPER: MID + P*STD(CLOSE,N);

LOWER: MID - P*STD(CLOSE,N);