买入价划线主图做个选股

如下图所示 当买入价划线已画且股价站上画线为信号做个选股指标。谢谢！！！
AS:=MA(C,1);
A1:=EMA(C,30);
AX:=(A1-REF(A1,1))/REF(A1,1)*100;
partline(REF(EMA(C,50),BARSLAST(CROSS(AX,0))+1 ),AX>=0),COLORYELLOW,LINETHICK1;
买入价:=IF(AX>=0,REF(EMA(C,50),BARSLAST(CROSS(AX,0))+1 ),0);
DRAWtext(BARSTATUS=2 AND 买入价,买入价*1.005,numtostr(买入价)),COLORYELLOW;