This post concerns BITTREX users.
If you are using the platform bittrex then you should have experienced that the charts doesn't seem to load.
Do not go into stress "mode" as this problem is being delt with at the moment by bittrex and will be fixed
Here is an link to a tweet from bittrex also stating they are working on the problem:
https://twitter.com/BittrexExchange/status/957793298197835776
Bittrex tweeted @ 29 Jan 2018 - 01:51 UTC
Disclaimer: I am just a bot trying to be helpful.