I am testing several platform in this period and except very few (3 so far )they ALL have weird "behaviors":
Let's speak about HitBTC.
Note: tested with 200$
Deposit and withdrawal worked for good.
The main problem is that almost ALL you see in the book is fake above all in the smallest coins.
One example for all BCN/BTC you can check it here https://hitbtc.com/exchange/BCN-to-BTC.
I arrived on BCN on HitBTC cause I've noticed that this coin has got triple volume that on Poloniex.
When I took a look at the book for the 1st time I noticed that the 1st level of the books are filled with micro orders something like 0.15 cents max 1.5$ (value at the time being).
So with my 20 years of trading experience I asked myself how they can boast to trade 1.8M$ per day with this ridiculous book? So I started to check deeply.
And what I have found out? Simply! when the spread it's higher and when a certain time is elapsed they will compare in the trade history prices that you have never seen land on the book.
You can think "of course the orders match and everything is so fast that they go directly in the trade history and not on the market book".
I could even agree but what are the odds that even the trade's volume match perfectly?
Just imagine a book with 0.0000003960 BID and 0.0000003990 ASK I understand that 2 traders (1 buyer and 1 seller) in the same moment have the idea to place an order in the mid (0.0000003975), but this order is even the same size cause after the "huge" match you cannot find any residue at 0.0000003975; if the buyer place 10000$ of value and the seller 8500$ you would expect to find 1500$ on the book as 1st level of bid at least for 1 second cause the 1500$ hasn't been filled.
Just take a look yourself to understand for good: tiny orders present on the book and ALL (and when I say ALL trust me I mean ALL) the bigger matches happen in the way I described above.
So at the end of the day the volume is x3 the one you can find real (in my opinion) on Poloniex.
In normal regulated markets (NYSE, CME, NASDAQ) this quick matches can happen as well when 2 traders (mainly banks) agree for a common price/quantity on a stock with large spread and they place the trade at the same time (you don't see them but they are filled), but usually, I'd say always, they follow this procedure out of the market (blocks); and trust me that cannot be the case of BCN not for every "huge" trade, except you don't think that some currency like BCN on HitBTC is used ONLY as laundry.
I am not going to check all the books to understand if for the small coins the use the same trick, for me it's enough.
If for you it's not relevant to know that your exchange is quoting real prices/volumes, cause you just care that the money you put on your horse will grow, you can even trade on HitBTC but I would consider even other people experience with money locked or deposited late/never (I had this problem with Livecoin and I waited 4 days, spoiling my trade, before to get my money on the deposit and zero reply from the assistance).
General conclusion: most of what you see in the crypto-exchanges/markets is artificial as the coins are.
I could write hours about all the anomalies I've found in almost all the exchange markets but mainly remember you are just betting on something as no value hoping it will be x50 allowing you to run out before the game is over.