在股圣操盘主图中30分钟出现建仓时选股

编写要求：

买线:=EMA(C,2);卖线:=EMA(SLOPE(C,21)*20+C,42); BU:=CROSS(买线,卖线);SEL:=CROSS(卖线,买线);DRAWICON(BU,L-0.1,1);DRAWICON(SEL,H+0.1,2);DRAWTEXT(SEL,H+0.1,'卖出');STICKLINE(买线>=卖线,LOW,HIGH,0.0,1),COLORRED;STICKLINE(买线>=卖线,CLOSE,OPEN,2,1),COLORRED;STICKLINE(买线<卖线,LOW,HIGH,0.0,1),COLORGREEN;STICKLINE(买线<卖线,CLOSE,OPEN,2,1),COLORGREEN;STICKLINE(BU,OPEN,CLOSE,2,0),COLORYELLOW;STICKLINE(SEL,OPEN,CLOSE,2,0),COLORBLUE;主力:EMA(CLOSE,10),COLORRED;散户:EMA(CLOSE,5),COLORWHITE;绿降:(46.18*EMA(CLOSE,10)-31.82*EMA(CLOSE,4))/14.36,COLORGREEN,LINETHICK1;操盘:MA(CLOSE,9),COLORCYAN,LINETHICK2;界点:MA(CLOSE,20),COLORMAGENTA;LC:=REF(CLOSE,1);RSI:=((SMA(MAX((CLOSE - LC),0),3,1) / SMA(ABS((CLOSE - LC)),3,1)) * 100);FF:=EMA(CLOSE,3);MA15:=EMA(CLOSE,21);DRAWTEXT(CROSS(FF,MA15),(LOW * 0.99),'建仓'),COLORYELLOW;AA:=(HHV(HIGH,20) - (2 * ATR));BB:=CROSS(CLOSE,REF(HHV(HIGH,55),1));SSS:=CROSS(MIN(MA(CLOSE,13),AA),CLOSE);BBB:=BARSLAST(BB);SSSB:=BARSLAST(SSS);B1:=((BBB = 0) AND (REF(SSSB,1) < REF(BBB,1)));B1B:=BARSLAST(B1);B2:=((((BB = 1) AND (B1B < SSSB)) AND (B1B > 0)) AND (COUNT(BB,SSSB) < 3));B2B:=BARSLAST(B2);B3:=((((BB = 1) AND (B2B < B1B)) AND (COUNT(BB,SSSB) < 4)) AND (COUNT(BB,SSSB) > 2));DRAWTEXT((B1 = 1),(LOW - 0.6),'加仓'),COLORYELLOW;

解答：

 FF:=EMA(CLOSE,3);{选股周期---30分钟}