AFIAR, some third part app can give you such filters as coinstats.
anyway using trading volume will give you to loss your money because most of reported voulems are fake and too many altcoins have fake bumping bots.
Unless he's filtering the data by exchange then, in that case, he could aim for the reputable ones (such as Kucoin, Binance, Bittrex, etc.) and exclude the other ones.