此也可改成选股的

drawgbk(c=c,colorrgb(30,30,30),colorrgb(130,130,130),1);
和易:=REF(C,1);
郑:=SMA(MAX(C-和易,0),7,1)/SMA(ABS(C-和易),7,1)*100, color0066ff,linethick2;
短线买入预警:STICKLINE( CROSS(20,郑),20,50,1,0),colormagenta;
短线买入:STICKLINE( CROSS(郑,20),0,50,2,0),colorred;
江:=SMA(MAX(C-和易,0),7,1)/SMA(ABS(C-和易),7,1)*100, color0066ff,linethick2;
短线卖出预警:STICKLINE( CROSS(江,80),50,80,1,0),colorff9966;
短线卖出:sTICKLINE( CROSS(80,江),50,100,2,0),color00ff00;
50,colorred;

请老师改成选股的公式