Well written piece. Although Bitmex is the most popular margin trading exchange, I do not belive that it is the most user-friendly. A lot of traders (including me) are turned off by the advanced interface. This is why i like the Delta Exchange, an exchange that is easy to use, and that offers a range of innovative solutions such as automated trading and an option to hold USDT when you aren't certain about the direction of the market.
RE: What is bitmex?