请教，查询账户持仓有几个品种用哪个函数？

太感谢了！

Vars Global Array<String> PositionSymbols; //当前帐户持有仓位的所有品种 Events OnBar(ArrayRef<Integer> indexs) { A_GetPositionSymbols(PositionSymbols); Commentary("当前帐户共有 " + text(GetArraySize(PositionSymbols)) + " 个持仓品种"); Numeric i; For i = 0 To GetArraySize(PositionSymbols) - 1 { Commentary("第 " + Text(i+1) + " 个品种:" + PositionSymbols[i]); } }