取不到group組裡面的股票本人

不好意思 我又上來詢問了

實在想不透 我在一開始的時候就把stockID設成字串變數

為什麼跑出來的錯誤還會是GetSymbolField：第 1 個參數應該是 String/Input/Group。

Inputs: 

    cbgroup(group,"可轉債本人");

SetFirstBarDate(20200101);

Vars:

cbsize(0),

i(0),

cbClose(0),

change_Price(0),

change_Value(0),

stockID(""),

stockClose(0),

priceGAP(0),

average_priceGAP(0),

validCount(0);

cbsize = GroupSize(cbgroup);

average_priceGAP = 0;

validCount = 0;

For i = 1 to cbsize 

Begin

    cbClose   = GetSymbolField(cbgroup[i],"Close",default:=0); 

    change_Price = GetSymbolField(cbgroup[i],"轉換價格",default:=0);

    stockID   = GetSymbolInfo(cbgroup[i],"標的物");

    stockClose = GetSymbolField(stockID,"Close",default:=0);

    If change_Price > 0 and stockClose > 0 and cbClose > 0 Then 

    Begin

        change_Value = stockClose / change_Price * 100;

        priceGAP = (cbClose - change_Value) / change_Value * 100;

        average_priceGAP = average_priceGAP + priceGAP;

        validCount = validCount + 1;

    End;

End;

If validCount > 0 Then

    Plot1(average_priceGAP / validCount, "平均折溢價%");