{====================================================================
 潜龙吸水·主力版 (个股)
 买入: xih3(近3日吸货) AND CTA9(主力>散户)
 卖出: zhong(终止信号)
 回测: Calmar 2.31, 收益96.4%, 轮次68, 失效率33%
 适用: 个股(主板/创业板/科创板)
=====================================================================}

{===== 1. 吸货线(复用BTS底层) =====}
A1:=REF(LOW,1);
A2:=SMA(ABS(A1-LOW),3,1);
A3:=SMA(MAX(LOW-A1,0),3,1);
A4:=IF(A3>0.000001,A2/A3*100,100);
A5:=EMA(A4*10,3);
A6:=LLV(LOW,26);
A7:=HHV(A5,26);
A8:=IF(LOW<=A6,(A5+A7*2)/2,0);
吸货线:=MIN(EMA(A8,3)/618,25);

{===== 2. xih3: 近3日内有吸货信号 =====}
xih3:=吸货线>0.001 OR REF(吸货线,1)>0.001 OR REF(吸货线,2)>0.001;

{===== 3. CTA9: 主力>散户 =====}
{zl = EMA(相对位置,13), sh = EMA(zl平滑,2), CTA9 = zl>sh}
c3:=(2*CLOSE+HIGH+LOW)/4;
zl:=EMA((c3-LLV(LOW,34))/(HHV(HIGH,34)-LLV(LOW,34))*100,13);
sh:=EMA(0.667*REF(zl,1)+0.333*zl,2);
主力确认:=zl>sh;

{===== 4. zhong: 终止卖出信号 =====}
V8:=(CLOSE-LLV(LOW,21))/(HHV(HIGH,21)-LLV(LOW,21))*100;
risk:=CEIL(SMA(SMA(V8,13,8),13,8));
rsv27:=(CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*100;
j27:=3*SMA(rsv27,5,1)-2*SMA(SMA(rsv27,5,1),3,1);
zd:=MA(j27,5);
终卖:=CROSS(zd,risk);

{===== 5. 买点/卖点 =====}
买点:=xih3 AND 主力确认;
卖点:=终卖;

{===== 6. 信号标记 =====}
STICKLINE(买点,LOW*0.98,LOW*0.96,1,0),COLORGREEN;
STICKLINE(卖点,HIGH*1.02,HIGH*1.04,1,0),COLORRED;
DRAWTEXT(买点,LOW*0.95,'B'),COLORGREEN;
DRAWTEXT(卖点,HIGH*1.05,'S'),COLORRED;