VAR1:=(2*CLOSE+HIGH+LOW+OPEN)/5;
VAR2:=LLV(LOW,21);
VAR3:=HHV(HIGH,21);
SK:EMA((VAR1-VAR2)/(VAR3-VAR2)*100,5);
SD:EMA(0.667*REF(SK,1)+0.333*SK,4);
DRAWBAND(SK,RGB(205,85,85),SD,RGB(23,123,123));
买进:IF(CROSS(SK,20) OR CROSS(SK,SD) AND SK>20,20,2),coloryellow;
卖出:IF(CROSS(SD,SK) AND SK>=60,80,99),colorcyan;
牛能分界:50,DOTLINE,colorred;
