uhhh, have you ever seen the swings in BTC? if you are leverage 1:70, you better hope you get in at the exact right time. way too easy to get called like that.
lol. yeah....lets all take a 70:1 leveraged position on a low volume illiquid exchange:
AROOOOGAH AROOOOOGAH (alarm bell sounds) 70:1 leveraged position alert!
Set bot trading algorithms to margin call co-ordinates $xxx.xx! CHECK!
Deploy front running market order bot to trigger sudden market order one satoshi beneath margin call! CHECK!
etc
etc