買賣超異常

請問一下為何一使用買賣超就出問題?收尋出來的結果完全不一樣，下面1跟2只差在買賣超，但是買賣超都沒放進判斷為何會有這樣差異

1.

SetBarFreq("D"); 

value1 = bollingerband(closed(0), 20, 2.0);

value2 = bollingerband(closed(1), 20, 2.0);

//value20 = summation(GetField("主力買賣超張數","D"), 1);

//value21 = summation(GetField("主力買賣超張數","D"), 5);

//value22 = summation(GetField("主力買賣超張數","D"), 10);

if closed(0) > value1 and closed(1) < value2 then ret=1;

2.

SetBarFreq("D"); 

value1 = bollingerband(closed(0), 20, 2.0);

value2 = bollingerband(closed(1), 20, 2.0);

value20 = summation(GetField("主力買賣超張數","D"), 1);

value21 = summation(GetField("主力買賣超張數","D"), 5);

value22 = summation(GetField("主力買賣超張數","D"), 10);

if closed(0) > value1 and closed(1) < value2 then ret=1;