Where the volume is coming from is one of the MaxCoin reboot mysteries. Jubi is the exchange that coinmarketcap.com references for current price and charts and volume for Maxcoin. Jubi (a China exchange) is only open to Chinese citizens reportedly and furthermore it is said that Maxcoin deposit and withdrawal are not functioning. I don't know if that is still the case. It appears that the exchange operators are playing some kind of game. For many months the price of Max on yobit was much lower than Jubi. If Jubi prices and volume were REAL and REAL people were trading Max to such levels (as high as 15 cents while at yobit the price was 2 cents) why didn't these Chinese folks sell Max at Jubi and transfer BTC out to yobit to buy Maxcoin much cheaper. They would have if they actually existed and actually wanted to accumulate Maxcoin. I can't say I know exactly what is going on but the true market price and volume for Maxcoin is what is seen at the Yobit market. To further understand this issue it would be great to find a Mandarin fluent person who is into crypto!
Recently the price at Jubi has been falling reaching equality with Maxcoin at Yobit. Almost appearing as if deposits had opened up allowing arbitrage to correct the prices of the two exchanges. lol but within the last few days Jubi price crashed to like 1/3rd the yobit price (WTF does that mean).
Bottom line I would just ignore Jubi as this situation will sort itself out or resolve eventually. If the Maxcoin community keeps growing and pushing forward the volumes at Yobit (or at another exchange Max gets listed at) will overwhelm Jubi and coinmarketcap will reference the new exchange and the confusion will be gone. Or Jubi will unwind whatever game they are playing...something that appears to be currently underway...