This is an example of a trade at Mt. Gox:
However, that transaction was actually for 20btc at $18.2101 not 19.87BTC bought at $18.3292. On first glance, because both the rate is higher than I bid and the BTC is lower, it looks like Mt. Gox is charging me more for less BTC. I might expect one of these figures to be altered to include the 0.65% fee, but not both. It took me a minute to understand that 20*$18.2101=19.87*$18.3292=$364. In other words, I'm paying what I should pay, in dollars, but I get less BTC. The amount of BTC that I got, 19.87btc, is exactly 0.0065*20. So that's where the fee is buried I guess.
This is pretty confusing, and bad record-keeping because I'd like to know actually what I bid so I can make better and quicker decisions about where to set offers in order to at least recover fees. This is the old issue of the spread or cycle versus two times the fees (for trading to BTC and back). The fees should be settled in an entirely different column, not built-in. However, ticker data seems to show my correct bid of 20BTC at 18.2101.
For that matter, why are both the BTC and the rate altered from my bid? If the fee is inbuilt, it should be one number or the other that is altered, not both. That's why, as I said, on first glance it looks like the rate was jacked up and I got less BTC than what I bid for, giving the illusion of a double-fee.
Mt. Gox, I love you and your master, MagicalTux, but I'd like to see this corrected, if possible. For that matter, some folks on IRC and I think it would be pretty clever to have 2 big red buttons at the top of the trade page that say "Sell All BTC" and "Buy Max BTC" because doing math is hard when I'm hyped up on caffeine and corn nuts and my eyes are twitching and I need instant gratification. Also I want a pony.
Does anyone else have such issues or is it just me? If that question is too boring, then just tell me what your favorite technical indicator or chart study is. Mine is probably MACD, but mostly because it sounds like a 1980s rapper.