請問一下程式有寫錯誤?

您好，我是新手，現在正在學習中，寫了下面的語法可是繪圖沒有出現，要請問一下是哪邊有寫錯?

語法：

value1=GetSymbolField("2330.tw","大戶持股比例","W",param := 10);

value2=GetSymbolField("FIMTX02.TF","基差","1");

value3=GetSymbolField("FIMTX02.TF","十大交易人未沖銷賣口","D");

value4=GetSymbolField("2330.TW","日期","Tick");

 

plot1(value1);

plot2(value2);

plot3(value3);

plot4(value4);