A class does not deduct its template arguments

Why doesn't this class deduce its template arguments?

template <class T>
struct Ohlc
{
    T o;
    T h;
    T l;
    T c;
};

template <class T, template <class> class Coll>
class OhlcCollector
{
private:

    using Container = Coll<Ohlc<T>>;

public:

    OhlcCollector(Container & container)
    {
    }
};

int main()
{
    std::vector<Ohlc<double>> v;

    // error C2641: cannot deduce template arguments for 'OhlcCollector'
    OhlcCollector collector(v);

    //but this comples
    OhlcCollector<double, std::vector> collector(v);
}

What is the rule applied here?

What kind of arguments are deduced and what are not?