双重底选股公式

A1:=llv(low,10); {最近10天的低点}
A2:=llv(low,30); {最近30天的低点}
A3:=ref(llv(low,30),30);{30天以前,至60天内的低点}
abs(A3-A1)/A3*100<3 and A1>A3 and A1>A2 and c>ref(c,1) and  ref(c,1)>ref(c,2);