Is it any good of a position how can I improve further. I am holding on the coins since two days now

and loosing a lot in swap cost that's eating up my earlier profit.
Some of my strategies :
1. I only buy limit orders never tried any other order types. I do understand them theoretically.
2. I am only trading BTC/USD and I just buy when price is low and sell when its high, but I never shy to take risk.
3. I never receive swaps and let the BFX give me on best possible rate.
4. This is my first ever trading experience and I started last month.
Questions :
Can I add trailing stop for selling my coins or still stick to limit orders not to mention limit order will not give me best benefit if price rises. And if I do add trailing short orders how to do so.
What is your most used order types, do you try different orders as well and when to use what, say when price is rising and you think it will go 2-3$ high.
Is it stupid for me to add too many BTC long order?
And here is my position :
http://gyazo.com/39bc1c6880e0edf2f6f0ba77a1986c11