''dont like to buy when things go up'' Well that works out better than selling when things are trending up.But my comments dont really apply to a 5 minute chart; so your results/time frame may differ
I always found the division between "trend traders" and "countertrend traders" kind of funny. Even trend followers are trading counter-trend on a lower time frame when buying dips. The only gold I own is a 1 oz golden eagle I bought in a local shop. I'm down about $100 bucks on that little investment.
The truth of the matter is that pretty much all instruments are _both_ mean-reversing and trend-following, depending on the point of time and time horizon. The holy grail of investing is accurately determining which mode you are in and when.
Wouldnt it be safer to average into something like GDX (mining stock ETF) or GLD than 3x ETN's? Arent you worried about decay? Gold and silver miners have been hit a lot harder than gold anyway.