出现三角形为买入信号提示，共有3中，波段高点还会有逃顶提示。

N:=10;
 MA5:=MA(C,5),colorwhite;
 MA10:=MA(C,10),COLORFF00FF;
 MA20:=MA(C,20),COLOR00FF00;
 MA30:=MA(C,30),coloryellow;
 MA120:=SMA(C,120,1),COLOR0000FF;
 ZH520:=ABS(MA5-MA20)/MA20*100<=N;
 ZH530:=ABS(MA5-MA30)/MA30*100<=N;
 QSXS1:=MA5>REF(MA5,1);
 QSXS2:=MA20>REF(MA20,1);
 QSXS3:=MA30>REF(MA30,1);
 DTPL:=MA20>MA30 AND MA30>MA120;
 LYHT:=DTPL AND QSXS2 AND QSXS3 AND NOT(QSXS1) AND REF(QSXS1,1);
老鸭回头买:LYHT*50,COLORFF00FF;
 WR5:=100*(HHV(H,5)-C)/(HHV(H,5)-LLV(L,5));
 WR6:=100*(HHV(H,6)-C)/(HHV(H,6)-LLV(L,6));
 WR:=80-(WR5*3+WR6*2)/5;
坑:IF(WR<0,WR,0),coloryellow;
 LYT:=DTPL AND QSXS2 AND QSXS3 AND COUNT(QSXS1,4)<=1;
 GJHS:=C>MA5 AND ((QSXS1 AND NOT(REF(QSXS1,1))) OR C>REF(C,3));
 LYKK:=GJHS AND (ZH520 OR ZH530) AND LYT;
买:(LYKK AND NOT(REF(LYKK,1)))*50,COLOR00FF00,LINETHICK2;
优选:(买 AND COUNT((MA10>MA20),5)=5)*100,coloryellow,LINETHICK2;
 DRAWTEXT(老鸭回头买,10,'●'),COLORFF00FF;
 DRAWTEXT(老鸭回头买,10,'¤'),COLORFF00FF;
 STICKLINE(WR<0,WR,0,2,0),coloryellow;
 STICKLINE(WR<-10,WR,-10,2,0),colorwhite;
 DRAWTEXT(买,80,'★买'),COLOR00FF00;
 DRAWICON(优选,10,4);
 VARC:=SMA(MAX(C-REF(C,1),0),6,1)/SMA(ABS(C-REF(C,1)),6,1)*100;
 DRAWICON(CROSS(82,VARC),80,5);
 VAR6:=REF(C,1);
 VAR7:=SMA(MAX(C-VAR6,0),6,1)/SMA(ABS(C-VAR6),6,1)*100;
 DRAWTEXT(CROSS(84,VAR7),100,'逃顶'),coloryellow ;