I usually check first on CoinMarketCap where the coins I trade have a high price with a large volume of transactions at any time, so I do not determine a must always transactions in a famous exchanger.
Hos sure you are in coinmarketcap that the Coins listed has a correct volume?and not being faked as they have a record doing this for how many times.
Try to reach in this one
https://www.coingecko.com/enFor more accurate prices and movements.
@OP: there is nothing best exchange but those who have been here for long time and a little issue had facing.
But please never trust YOBIT and other platform with the same status.