Prices on yobit are always higher than other exchanges, I don't know why exactly, maybe because few people use it.
Personally I didn't use it because of its high fees, I tryed once to use it to sell a token but I found that I have to pay more than 40$ to make a deposit which is more than what I am going to win from selling on it.
so khaled what exchange you are using in the mean time ? and is there any with less fees than yobit ? what is according to you the most optimal exchange where fees are cheaper and you can find a lot of cryto currencies with their real values ?
I know you asked this question to OP but I will tell my experience with these crypto exchanges.
I have an account on bittrex for a long time with fully verified so I mostly use this exchange to buy and sell. So far I don't have any issues with this bittrex exchange but recently heard that they stopped replying to tickets.
Also, many tokens are not listed on Bittrex exchange so I used few times hitbtc for those coins. This is very slow to add funds and to withdraw funds and no response from support team. So I don't recommend this exchange.
You can check new exchange kucoin because I heard that they are quite reasonable with the fee as well.