MA5 := MA(CLOSE,5);
MA15 := MA(CLOSE,15);
MA55 := MA(CLOSE,55);
PDAY1 := BARSLAST(CROSS(MA5,MA55));{5日均线上穿55日均线}
PDAY2 := BARSLAST(CROSS(MA15,MA55));{15日均线上穿55日均线，至此形成鸭颈部}
PDAY3 := BARSLAST(HIGH=HHV(HIGH,PDAY2));{形成头部，要下跌}
PDAY4 := BARSLAST(CROSS(MA15,MA5));{下跌后，5日均线和15日均线死叉}
PDAY5 := BARSLAST(CROSS(MA5,MA15));
A1:= PDAY1>PDAY2 AND PDAY2>PDAY3 AND PDAY3>PDAY4 AND PDAY4>PDAY5 AND PDAY5<5;
A2:= COUNT(CROSS(MA15,MA5),PDAY2)=1;
A1 AND A2;
