把股价下穿支撑线做个预警选股

编写要求：

N:=20;M:=32;P1:=80;P2:=100; VAR1:=(C+H+O+L)/4; 卖出:=XMA(VAR1,N)*(1+P1/1000),COLORFFFFFF,LINETHICK3; 买入:=XMA(VAR1,M)*(1-P2/1000),COLOR0000FF,LINETHICK3; DRAWBAND(卖出,RGB(200,50,55),卖出*1.03,RGB(0,100,50)); DRAWBAND(买入,RGB(0,55,0),买入*0.97,RGB(55,55,0)); 幅度:100*(卖出-买入)/买入,NODRAW; MA1:=MA(VAR1,3); STICKLINE(卖出>LOW AND 卖出MIN(C,O) AND 卖出LOW AND 卖出LOW AND 买入MIN(C,O) AND 买入LOW AND 买入0.04 AND (MA(C,10)-MA(C,5))/MA(C,5)>0.04,30,0),1),COLORF00FF0,LINETHICK2; RSV2:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100; K2:=REF(MA(RSV2,3),1)+(RSV2-REF(MA(RSV2,3),1))/3; D2:=REF(MA(K2,3),1)+(K2-REF(MA(K2,3),1))/3; J2:=3*K2-2*D2; BB1:=EMA(J2,5); BB2:=REF(BB1,1); 金叉:=CROSS(BB1,BB2); DRAWTEXT(CROSS(C,买入) AND BB1>BB2 AND C>REF(O,2),买入*0.95,'买入'),COLOR0000FF; DRAWICON(CROSS(C,买入) AND 金叉 AND 机会来临 ,LOW*0.96,26); DRAWTEXT(CROSS(C,买入) AND 金叉 AND 机会来临,LOW*0.92,'【绝杀点--指标超市】'),COLOR00FF00;

解答：

?N:=20;M:=32;P1:=80;P2:=100;

VAR1:=(C+H+O+L)/4;