Most of my altcoins are ERC20 so most of them are available on decentralized coin exchanges like EtherDelta, ForkDelta and IDEX.But i like to trade in exchanges with huge volumes like Bittrex and Binance. But some of the ERC20 coins are available on KuCoin and CoinExchange so I always do trading through these two coin exchanges as they are somehow reliable and faster than decentralized coin exchanges. But some of my coins were pushing into Binance and Bitfinex listing so that the coin value will then soon pump.