过去我用过一段时间天狼50，天狼50的均线和我们常用的均线略有不同，主要是加入了成交量，把狼帅均线设成8,21,60，和无穷。指标的写法是这样的

AGA:=IF(DYNAINFO(8)>0.01,0.01*DYNAINFO(10)/DYNAINFO(8),DYNAINFO(3));
AGB:=(DYNAINFO(5)<0.01 || DYNAINFO(6)<0.01);
AGC:=IF(AGB,1,(AGA<(DYNAINFO(5)+0.01) && AGA>(DYNAINFO(6)-0.01)));
MA8:IF(AGC,0.01*EXPMA(AMOUNT,P1)/EXPMA(VOL,P1),EMA((HIGH+LOW+CLOSE)/3,P1));
MA21:=IF(AGC,0.01*EXPMA(AMOUNT,P2)/EXPMA(VOL,P2),EMA((HIGH+LOW+CLOSE)/3,P2));
MA60:=IF(AGC,0.01*EXPMA(AMOUNT,P3)/EXPMA(VOL,P3),EMA((HIGH+LOW+CLOSE)/3,P3));
MA∞:=IF(AGC,DMA(AMOUNT/(100*VOL),100*VOL/FINANCE(7)),EMA((HIGH+LOW+CLOSE)/3,120));

这几根线和普通均线的不同在于，有时股价跌了几天，那么均线也就随着拐头向下了，但是如果是跌的时候量很小，天狼50的这几根线是不拐弯的。或者幅度很小，所以叫成本均线。

有一个思路是这样的：股票经过上涨，大部分的筹码都获利了，成本均线走势圆滑漂亮，忽然股票急转直下，连续下跌，那这时该不该买入呢。这个时候就要看看获利筹码的情况了，如果跌之前几乎满盘获利，现在的获利迅速的打到了获利50%以下或者更多，而成交量又很小的话，就是一个很好的捡钱的机会。我们叫他受伤庄股，因为庄家这时也被套在里面了，后面庄家必须拉升才能解放自己。用指标是这样表达就可以了。

TJ1:=当前获利筹码>40;{太小就不大对劲了}
TJ2:=MA60>MA∞ AND MA21>MA60;
TJ3:=收盘价<MA∞;
受伤庄股:TJ1 AND TJ2 AND TJ3;

当然任何指标都要灵活运用，不能生搬硬套，要全面分析。
估计大盘最近要有一次洗盘的过程，我想受伤的庄家应该一定会有的。祝大家股票天天赚钱！

{P1 2 30 8}
{P2 2 60 21}
{P3 2 120 60}
{天狼成本均线}
STICKLINE(C>=O,C,O,3,0),COLOR000045;
STICKLINE(C>=O,C,O,2.5,0),COLOR000065;
STICKLINE(C>=O,C,O,2,0),COLOR000085;
STICKLINE(C>=O,C,O,1.5,0),COLOR0000A5;
STICKLINE(C>=O,C,O,1,0),COLOR0000C5;
STICKLINE(C>=O,C,O,0.5,0),COLOR0000E5;
STICKLINE(C>=O,H,L,0,0),COLOR0000F5;
STICKLINE(C<O,C,O,3,0),COLOR656500;
STICKLINE(C<O,C,O,2.5,0),COLOR757500;
STICKLINE(C<O,C,O,2,0),COLOR858500;
STICKLINE(C<O,C,O,1.5,0),COLOR959500;
STICKLINE(C<O,C,O,1,0),COLORA5A500;
STICKLINE(C<O,C,O,0.5,0),COLORB5B500;
STICKLINE(C<O,H,L,0,0),COLORC5C500;
JJJ:=IF(DYNAINFO(8)>0.01,0.01*DYNAINFO(10)/DYNAINFO(8),DYNAINFO(3));
DDD:=(DYNAINFO(5)<0.01 || DYNAINFO(6)<0.01);
JJJT:=IF(DDD,1,(JJJ<(DYNAINFO(5)+0.01) && JJJ>(DYNAINFO(6)-0.01)));
MA8:IF(JJJT,0.01*EXPMA(AMOUNT,P1)/EXPMA(VOL,P1),EMA((HIGH+LOW+CLOSE)/3,P1))COLORWHITE LINETHICK2;
MA21:IF(JJJT,0.01*EXPMA(AMOUNT,P2)/EXPMA(VOL,P2),EMA((HIGH+LOW+CLOSE)/3,P2))COLORYELLOW LINETHICK2;
MA60:IF(JJJT,0.01*EXPMA(AMOUNT,P3)/EXPMA(VOL,P3),EMA((HIGH+LOW+CLOSE)/3,P3))COLORMAGENTA LINETHICK2;
MA∞:IF(JJJT,DMA(AMOUNT/(100*VOL),100*VOL/FINANCE(7)),EMA((HIGH+LOW+CLOSE)/3,120))COLORBLUE LINETHICK2;
获利:=WINNER(CLOSE)*100;
受伤庄股:=获利>40 AND MA60>MA∞ AND MA21>MA60 AND C<MA∞ AND REF(C,3)>MA∞  STICK;
DRAWTEXT(受伤庄股,(L-0.04),'受伤庄股'),COLORCYAN;

以下是选股

{受伤庄股}

JJJ:=IF(DYNAINFO(8)>0.01,0.01*DYNAINFO(10)/DYNAINFO(8),DYNAINFO(3));
DDD:=(DYNAINFO(5)<0.01 || DYNAINFO(6)<0.01);
JJJT:=IF(DDD,1,(JJJ<(DYNAINFO(5)+0.01) && JJJ>(DYNAINFO(6)-0.01)));
MA8:=IF(JJJT,0.01*EXPMA(AMOUNT,8)/EXPMA(VOL,8),EMA((HIGH+LOW+CLOSE)/3,8))COLORWHITE LINETHICK2;
MA21:=IF(JJJT,0.01*EXPMA(AMOUNT,21)/EXPMA(VOL,21),EMA((HIGH+LOW+CLOSE)/3,21))COLORYELLOW LINETHICK2;
MA60:=IF(JJJT,0.01*EXPMA(AMOUNT,60)/EXPMA(VOL,60),EMA((HIGH+LOW+CLOSE)/3,60))COLORMAGENTA LINETHICK2;
MA∞:=IF(JJJT,DMA(AMOUNT/(100*VOL),100*VOL/FINANCE(7)),EMA((HIGH+LOW+CLOSE)/3,120))COLORBLUE LINETHICK2;
获利:=WINNER(CLOSE)*100;
受伤庄股:获利>40 AND MA60>MA∞ AND MA21>MA60 AND C<MA∞ AND REF(C,3)>MA∞;