Sort:  

I short using Bitfinex. I go to my margine account, and fill in how many shares (coins) I want to short, then I fill in the price I want to short them from and instead of pressing "margine buy" I press "margine sell"

Coin Marketplace

STEEM 0.14
TRX 0.27
JST 0.034
BTC 105536.98
ETH 2599.94
USDT 1.00
SBD 0.87