But I don't understand what means: BUY at 0.34
it means I lose money betting to that option?
Thanks
It means if you think this outcome will happen, you can buy a share at 0.34 mBTC, and you will make 10 mBTC from that share if you are right (basically multiply your stake by 30).
I understand now
And I read you can short or long,is that right? how can you if you are buying a share?