大盘专用，适用周线，能断中、长期底部，其他周期不适宜。
DJ:=C>=LLV(C,130);
DL:=VOL<=LLV(VOL,13);
小阳:=CLOSE/OPEN<=1.0191 AND CLOSE>OPEN;
小阴:=CLOSE/OPEN>=0.618 AND CLOSE<OPEN;
昨日小阳:=REF(CLOSE,1)/REF(OPEN,1)<=1.0191 AND REF(CLOSE,1)>REF(OPEN,1);
昨日小阴:=REF(CLOSE,1)/REF(OPEN,1)>=0.618 AND REF(CLOSE,1)<REF(OPEN,1);
昨日小柱:=昨日小阳 OR 昨日小阴;
低换手率:=VOL/CAPITAL*100<7;
低涨幅:=C/REF(C,1)<1.0199 AND C-REF(C,1)>=0;
低跌幅:=REF(C,1)/C<1.0199 AND C-REF(C,1)<=0;
低涨跌幅:=低涨幅 OR 低跌幅;
昨日低跌幅:=REF(C,2)/REF(C,1)<1.0382;
低振幅:=(H-L)/REF(C,1)<0.2;
去停牌:=DYNAINFO(17)>0;
量比:=VOL/REF(MA(VOL,5),1)<1.1;
D22:=IF(NAMELIKE('S'),0,1);
D33:=IF(NAMELIKE('*'),0,1);
去ST:=D22 AND D33;
选股:=DJ AND DL AND 低涨跌幅 AND 低换手率 AND 低振幅 AND 去停牌 AND 去ST AND 量比;
小阳选股:=选股 AND 小阳;
小阴选股:=选股 AND 小阴;
地量:=小阳选股 OR 小阴选股;
地量选股:=EXIST(地量,3);
回升均价线:=C>=MA(C,4)*0.9;
回升均量线:=V>=MA(V,2)*0.9;
放量收阳线:=V-REF(V,1)>0 AND CLOSE>OPEN;
XG:地量选股 AND 回升均价线 AND 回升均量线 AND 放量收阳线;
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