如何用月线判断股票走势？

WVR := SUM((IF(CLOSE>OPEN,VOL,0)+IF(CLOSE=OPEN,VOL/2,0)),26)/
SUM((IF(CLOSE<OPEN,VOL,0)+IF(CLOSE=OPEN,VOL/2,0)),26)*100;
VR买:IF((CROSS(70,WVR)),5,0),COLORYELLOW;
{DPSJ}
RSV:=(INDEXC-LLV(INDEXL,18))/(HHV(INDEXH,18)-LLV(INDEXL,18))*100;
K:=SMA(RSV,12,1);
DPSJ买入:IF((CROSS(K,20)),10,0),COLORWHITE;
{KD}
WRSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;
WK:=SMA(WRSV,3,1);
D:=SMA(WK,3,1);
KD买入:IF((CROSS(WK,D)&&WK<20),8,0),COLORRED;
{KDJ}
K1:=SMA(RSV,3,1);
D1:=SMA(K1,3,1);
J:=3*K1-2*D1;
KDJ买入:IF((CROSS(J,0)),12,0),COLORGREEN;
{BOLL}
MID :=MA(CLOSE,20);
UPPER:=MID+2*STD(CLOSE,20);
LOWER:=MID-2*STD(CLOSE,20);