请大神帮忙,帮下面一段通达信BOLL指标改成MT4的。多谢,多谢
MID1:=MA(C,N);
VART1:=POW((C-MID1),2);
VART2:=MA(VART1,N);
VART3:=SQRT(VART2);
UPPER:MID1+2*VART3;
LOWER:MID1-2*VART3;
BOLL:REF(MID1,1);
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