does it vary for different coins? I'm asking because if I want to day trade I want to make sure its doable. Someone told me it takes a long time to have a buy go through and a sell.
There are two kinds of trading :
1. You trade your cryptocurrencies directly and each coin of the exchanging pair has to be transferred. Such trading can be made for example on shapeshift or changelly. You send your coin, you want to exchange to a wallet of the exchanger and get the coin transferred to your wallet. This kind of trading is not suited for daytraders and is very expensive, because you must pay each time the transfer fee and the transfer time is generally too long for day traders.
2. You register at an exchanger and place your funds to a wallet of the exchanger. Exchangers are for example Bitfinex, Livecoin, Bitfinex, Cryptopia and Poloniex. There you can trade instant,' if the prices of your buy/sell orders meet the bids/asks. The trading pairs needn't to be transferred, because the funds are virtually transfered on the exchanger.