自訂指標改版後無法計算 數值顯示N/A

此指標程式碼已經使用很久，這次改版後在指數變得無法計算出數值(TSE/OTC)，個股正常，請小幫手幫忙看一下。

vars:

AdjClose(0),

AdjLow(0),

AdjHigh(0),

Price(0),

VWAP(0),

VWAPD(0),

VolumeSum(0),

ValueSum(0);

if Date <> Date[1] then begin

VWAPD = VWAP[1];

VolumeSum = 0;

ValueSum = 0;

end;

AdjClose = GetField("Close", "1", Adjusted:=true);

AdjHigh = GetField("High", "1", Adjusted:=true);

AdjLow = GetField("Low", "1", Adjusted:=true);

Price = (AdjHigh + AdjLow + AdjClose) / 3;

VolumeSum = VolumeSum + Volume;

ValueSum = ValueSum + Price * Volume;

if VolumeSum <> 0 then VWAP = ValueSum / VolumeSum;

Plot1(VWAPD, "VWAP D", Checkbox:=1);

Plot2(VWAP, "VWAP", Checkbox:=1);