SCR指标预警公式

源码：

P1:=90;
 A:=P1+(100-P1)/2;
 B:=(100-P1)/2;
 CC:=COST(A);
 DD:=COST(B);
 SCR:=(CC-DD)/(CC+DD)*100/2;
 CROSS(SCR,REF(SCR,1)) AND COUNT(SCR<REF(SCR,1),50)>=40;

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