SJ:=1;
VAR6:=(2*CLOSE+HIGH+LOW)/4;
VAR8:=LLV(LOW,20);
VARAA:=HHV(HIGH,26);
B8:=EMA((VAR6-VAR8)/(VARAA-VAR8)*100,8);
B18:=EMA(B8,5);
K底:=B8<20 AND crOSS(B8,B18);
K底1:=BArslAST(K底);
K底2:=REF(K底1,1);
底背离:B8<25*SJ AND CROSS(B8,B18) AND B8>REF(B8,K底2) AND C
