DIF:=EMA(CLOSE,12)-EMA(CLOSE,26);
DEA:=EMA(DIF,9);
MACD:=(DIF-DEA)*2;
BOLL:=MA(CLOSE,20);
UPPER:=BOLL+2*STD(CLOSE,20);
LOWER:=BOLL-2*STD(CLOSE,20);
K1:=CLOSE>OPEN ;
K2:=VOL>=2*REF(VOL,1);
K3:=CROSS(DIF,DEA) AND DIF<=0 ;
K4:=CROSS(CLOSE,BOLL);
选股:K1 AND K2 AND K3 AND K4 ;