低买的选股指标

编写要求：

A7:=C-REF(C,1);A8:=100*EMA(EMA(A7,6),6)/EMA(EMA(ABS(A7),6),6);SHORT:=7; LONG:=19;RMA:=EMA(CLOSE,SHORT);NMA:=EMA(CLOSE,LONG);UP:DRAWLINE(L=LLV(L,BARSLAST(CROSS(NMA,RMA))+1),LLV(L,BARSLAST(CROSS(NMA,RMA))+1),H=HHV(H,BARSLAST(CROSS(RMA,NMA))+1),HHV(H,BARSLAST(CROSS(RMA,NMA))+1),0);DOWN:DRAWLINE(H=HHV(H,BARSLAST(CROSS(RMA,NMA))+1),HHV(H,BARSLAST(CROSS(RMA,NMA))+1),L=LLV(L,BARSLAST(CROSS(NMA,RMA))+1),LLV(L,BARSLAST(CROSS(NMA,RMA))+1),0);买进:(LLV(A8,2)=LLV(A8,7) AND COUNT(A8<0,2) AND CROSS(A8,MA(A8,2))) AND REF(DOWN,1)REF(DOWN,1);趋势区:=IF((EVERY(DOWN>=REF(DOWN,1),1)),4,2)COLOR0000FF,LINETHICK3;低买:IF(((CROSS(趋势区,2.1))),5,0),STICK,COLORRED,LINETHICK3;高卖:IF(((CROSS(3.9,趋势区))),-5,0),STICK,COLORFF9150,LINETHICK3;　;请老师帮忙做一个低买的选股指标指标显示低买时的选股公式

解答：

 SHORT:=7;