三线布林主图指标 (源码)

M:=20;N:=2;
MID : MA(C,M);
UPPER: MID + N*STD(C,M);
LOWER: MID - N*STD(C,M);
UP1:MID+STD(C,M),POINTDOT;
LW1:MID-STD(C,M),POINTDOT;
UP2:MID + 3*STD(C,M)DOTLINE;