通达信、文华、博弈的主图和副图都可以用，显示支撑和压力点，高抛低吸很好用。
{多空判势通道}
N:=20;
MID:=MA(CLOSE,N);
UPPER:=MID+2*STD(CLOSE,N);
LOWER:=MID-2*STD(CLOSE,N);
MID,COLORWHITE,LINETHICK2;
UPPER,COLORRED;
LOWER,COLORGREEN;
STICKLINE(CLOSE>UPPER,HIGH,LOW,0,0),COLORRED;
STICKLINE(CLOSE<LOWER,HIGH,LOW,0,0),COLORGREEN;
STICKLINE(CLOSE>UPPER AND CLOSE>OPEN,CLOSE,OPEN,3,0),COLORRED;
STICKLINE(CLOSE>UPPER AND CLOSE<OPEN,CLOSE,OPEN,3,0),COLORRED;
STICKLINE(CLOSE<LOWER AND CLOSE>OPEN,CLOSE,OPEN,3,0),COLORGREEN;
STICKLINE(CLOSE<LOWER AND CLOSE<OPEN,CLOSE,OPEN,3,0),COLORGREEN;
