is simple. When the price of BTS in bitUSD (bitUSD/BTS) goes up, what is happening right now you can extend your profits by borrowing bitUSD and giving BTS as collateral.
You do this on dashboard. Go to your portfolio and click a dollar sign in borrow column in your BTS holding position.
USD margin dialog box open and you set amount of bitUSD you want to borrow from the blockchain in debt text edit line. Then with you set with ratio slider an amount of BTS collateral. The ratio must be greater then 1.75 but optimal is around 2 to 2.5.
When you satisfied with your choice, you hit update position button and magic, your bitUSD position is risen for amount borrowed. After a while when price rise enough you close (release) your debt in margin positions and make nice extra profit.
I can make more detail tutorial if you want and support me.
Now I go to a drink with my friend and have a nice evening (it's 20:55 in Slovenia now, a right time to go out).
RE: My instinct told me to defend myself