V11:=3*SMA((C-LLV(L,55))/(HHV(H,55)-LLV(L,55))*100,5,1)-2*Sma(SMA((C-LLV(L,55))/(HHV(H,55)-LLV(L,55))*100,5,1),3,1);
趋势线:=EMA(V11,3);
V12:=(趋势线-REF(趋势线,1))/REF(趋势线,1)*100;
BB:= (趋势线<=13 AND V12>13) AND FILTER((趋势线<=13 AND V12>13),10) ;
主力买入:BB;