what do you guys think about this: www.tensorbox.com

 

short selling means short selling?  selling bitcoin that you borrowed and buying it back later.

do you have accounts on any of these exchanges? coincheck shows "Now temporary restrict BTC borrowing", guess that implies no shortselling for now? hopefully it'll be back? how soon?). other exchanges seem to have margin trading but can't be sure how exactly that works and if it's currently available or "temporarily restricted

can anyone confirm which exchanges allow short selling bitcoins in japan (coincheck,zaif,bitflyer) or south korea (coinone,korbit,bithumb)?