麻烦老师能不能将通达信系统里布林极限指标（BB）0轴下金叉时改成选股公式，谢谢老师

Answer 1

N:=20;
MID:=MA(C,N);
VART1:=POW((C-MID),2);
VART2:=MA(VART1,N);
VART3:=SQRT(VART2);
UPPER:=MID+2*VART3;
LOWER:=MID-2*VART3;
BOLL:=REF(MID,1);
UB:=REF(UPPER,1);
LB:=REF(LOWER,1);
LOWER1:=MID-VART3;
LB1:=REF(LOWER1,1);
BB:=(C-LB1)/(UB-LB)*100;
MA6:=MA(BB,6);
0;
XG:CROSS(BB,0);

追问

不准确呀老师，0轴上的相对好些，0轴下的指标滞后了

追答

N:=20;
MID:=MA(C,N);
VART1:=POW((C-MID),2);
VART2:=MA(VART1,N);
VART3:=SQRT(VART2);
UPPER:=MID+2*VART3;
LOWER:=MID-2*VART3;
BOLL:=REF(MID,1);
UB:=REF(UPPER,1);
LB:=REF(LOWER,1);
LOWER1:=MID-VART3;
LB1:=REF(LOWER1,1);
BB:=(C-LB1)/(UB-LB)*100;
MA6:=MA(BB,6);
XG:CROSS(BB,MA6) and bb<0 and ma6<0;

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