VAR1:=(2*CLOSE+HIGH+LOW)/4;
VAR2:=LLV(LOW,34);
VAR3:=HHV(HIGH,34);
VAR4:=EMA((VAR1-VAR2)/(VAR3-VAR2)*100,13);
VARA:=EMA(0.667*REF(VAR4,1)+0.333*VAR4,2);
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买入建桥: IF(VAR4>VARA,2,-1),COLORRED,LINETHICK2;
卖出拆桥: IF(VAR4<VARA,2,-1),COLORGREEN,LINETHICK2;
