Sometimes, I used full margin or even daily margin. I used to

make some ALL IN posts, which I did with one of 3x. You may find I don't talk about it anymore coz it isn't helping people but hurting people. I know how to reduce my average cost and I can deal with the big drops. Some people really don't. We shouldn't mislead people here, especially those have not much trading experiences. 

Regarding to the average on UGAZ, I added a lot on that day's pre-market (around $5.41). I sold a half at $6.15 - $6.16 coz I need the funds to trade others. And, I've been holding the rest for weeks.