I'm bought price 0.00058
now 0.00041

you got screwed by the whales!! welcome on board :-)
It was an epic market manipulation game today between 10pm and 10:30pm CET
A huge bull run until 0.0065 and then a coordinated removal of the buy orders to drop it to 0.0050
Check on Bittrex, put 1min, zoom in and add the "on balance volume" indicator: see how the balance retracted suddenly.
On real stock markets, these people would have gone directly to jail...
Here, it is just brilliant :-)
I managed to get out with "only" minimal losses: overall I still gained on ARK, but did exit from it --> The pump today was mostly fake... not a good sign for the future when you see such organized pump..
Whales did a massive exit and newbies got crushed: duly noted. 200 BTC were on the table and at 30% spread, that is a heist of 60 BTC, aka 130,000 NXT...
Not it is a 0.44... even below the whales "limit".