Lucias, a couple of other comments for you:
I think I have mentioned this before, but one of the things you can do with forex, is deposit only the amount you're willing to risk on a given trade. It forces you to follow your own stop rule, and eliminates the effect of a "black swan" which takes away much more than your intended risk.
So here's the math:
I have a $4000 account right now. The amount I risk varies, but let's say that I only risk 1%. That's $40. So, deposit $40 in your trading account.
Again, this varies by trade, but let's say that I chose to set a stop $10 away from the current price of gold. $40/$10 = 4. This means that I can trade a maximum of 4 ounces of gold. At $2/ounce deposit, I immedately use $8 of that $40 just to hold the right to trade that gold. So, I am left with $32 of leeway. So, gold can move against me $8 ($4*8 = 32), and I'll be stopped out by the broker.
Look at that 75/25% win loss ratio again. If 1 ounce of gold of risk has a win loss of $5/$12 and a daily payout of $15, what does a 4 ounce of gold risk pay?
The other value of only depositing your risk is the "luck" of a sudden change in price at worst will cost your deposit, but at best will benefit you substantially more than what your loss would have been.
Yesterday, I was angry that I had been profitably kicked out of trade that I had been arguing with GrandSuperCycle. Emotional trading, not wise, I know. I'm not proud of this, but the size of my deposit protected me. I left $100 in my account, and risked 20 ounces of gold. In less then two minutes ( that may be an exaggeration; it all happened rather quickly) I had gained more than $200, 5% of my savings account, but my potential loss was always only 2.5%.