编写条件：
编写方法：
网友求助：
要求：下面指标出现波段时，编制预警。
源码：
K:=(C+H+L)/3;
D:=MA(K,4);
DRAWTEXT(REF(C,1)<D AND C>D AND D<REF(D,1) AND C>REF(C,1)*1.045,L*0.98, '波段'),COLORRED;
解答如下：
K:=(C+H+L)/3;
D:=MA(K,4);
REF(C,1)<D AND C>D AND D<REF(D,1) AND C>REF(C,1)*1.045;
D:=MA(K,4);
REF(C,1)<D AND C>D AND D<REF(D,1) AND C>REF(C,1)*1.045;
