THeta值看不到

Vars Global Integer id(0); Global Bool subFlag(False);Events OnReady() { if(!subFlag) { id = SubscribeBar(RelativeSymbol, \"1d\", BeginDateTime); subFlag = True; } } OnBar(ArrayRef<Integer> indexs) { Numeric volty = Volatility(data[id].Close); Print(\"Theta:\" + Text(Theta(TradingDayLeft, StrikePrice, data[id].Close, 5, volty, OptionType, OptionStyle))); }此公式看不到theta值麻烦老师看看哪里问题