CoinExchange.io has a minimum deposit amount of 0.1 ETH.
This is clearly indicated on all ETH deposit pages.
The minimum amount must be deposited to one address for the amount to clear into your account. This can be done in one or multiple deposits.
What if I have deposit an amount lower than 0.1 ETH ?
In order for your pending deposit to clear, you will need to deposit the difference between your current deposit amount and 0.1 ETH.