DOWN:=OPEN>CLOSE;
x1:=COUNT(DOWN,5)=4;
X2:=(HHV(C,20)-LLV(C,1))/ LLV(C,1)/50*100;
x3:=(MIN(CLOSE,OPEN)-LOW)/(HIGH-LOW)>0.667 and (HIGH-MAX(CLOSE,OPEN))/(HIGH-LOW)<0.333 and (c-o)<0.1;
x4:=v 选:X1 and x2 and x3 and x4;