XA_1:=100-90*(HHV(HIGH,21)-CLOSE)/(HHV(HIGH,21)-LLV(LOW,21));

XA_2:=100-MA(100*(HHV(HIGH,6)-CLOSE)/(HHV(HIGH,6)-LLV(LOW,6)),34);

XA_3:=(CLOSE-REF(CLOSE,1))/REF(CLOSE,1)*100;

XA_4:=CLOSE> REF(CLOSE,1) AND CLOSE> REF(CLOSE,2);

XA_5:=CLOSE< REF(CLOSE,1) AND CLOSE< REF(CLOSE,2);

XA_6:=REF(XA_5,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);

XA_7:=REF(XA_6,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);

XA_8:=REF(XA_7,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);

XA_9:=REF(XA_8,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);

XA_10:=REF(XA_9,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);

XA_11:=REF(XA_10,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);

XA_12:=REF(XA_11,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);

XA_13:=REF(XA_12,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);

XA_14:=REF(XA_13,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);

XA_15:=REF(XA_14,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);

XA_16:=REF(XA_15,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);

XA_17:=XA_5 OR XA_6 OR XA_7 OR XA_8 OR XA_9 OR XA_10 OR XA_11 OR XA_12 OR XA_13 OR XA_14 OR XA_15 OR XA_16;

XA_18:=XA_4 AND REF(XA_17,1);

XA_19:=REF(HIGH+LOW,1)/2;

XA_20:=SUM(MAX(0,HIGH-XA_19),26)/SUM(MAX(0,XA_19-LOW),26)*100;

龙头诀选股预警:CROSS(XA_1,MA(XA_2,6)) AND XA_18 AND XA_20>REF(XA_20,1) AND XA_3>5;{45.67%/1.94/2403}