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源碼如下： TA:=RANGE(DATE,1140101,1140401)-1;
T:=REF(YEAR=2013,1) AND YEAR=2014;
TT:=BARSLAST(T);
A:=YEAR=2014 AND (MONTH=1 OR MONTH=2 OR MONTH=3);
T1:=REF(A,1) AND MONTH=4;
HC:=FINDHIGH(C,T1+1,TT,1);
LO:=FINDLOW(O,T1+1,TT,1);
IF(TT>0 ,CONST(REF(HC,TA)),DRAWNULL);
IF(TT>0 ,CONST(REF(LO,TA)),DRAWNULL); 
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