Have you discovered some token were disappearing within the market at this period. Such as Bitboost just suddenly disappeared away from market without prior awareness. Should that be? Is that not a cheat?
I think the coin was kicked from the trading market. We see that throughout 2018 the price decline was very sharp. And that has a negative impact on all coins. So that many coins fail. And to invest better in the top coins.
usually an exchange will remove a coin or token,
because the coin or token didn't have a good volume and less trading activity
and thats very reasonable for the exchange to remove it,,
this is to make the exchange stable and always listed a crypto with good volume,, thats my opinion