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}

MA15:=EMA(CLOSE,21);