L1:=ABS(L-REF(L,1))<=0.02;
L2:=ABS(L-REF(L,2))<=0.02;
L3:=ABS(L-REF(L,3))<=0.02;
L4:=ABS(L-REF(L,4))<=0.02;
L5:=ABS(L-REF(L,5))<=0.02;
精准线首次:=L1 OR L2 OR L3 OR L4 OR L5;
{一帆精准选股}
精准左:=FILTER(精准线首次,3) ;
天数:=BARSLAST(精准左);
LTS:=REF(L,天数);
精准右:=ABS(L-LTS)<=0.02;
YF:精准左 AND 精准右 ;