I was trading for years (since I was 18) and made my living from it. Not only did it pay for my living, it paid for my schooling and allowed me to have extra time to do things that I like to do. I also took jobs that I wanted to take rather than have to take (I just switched the time hours of my trading).
1) There is no question of "win". It's a question of how much will I make?... If you are looking at it as a win/lose situation, well you already lost. As soon as you enter a trade you lost because they charge you an amount to get into a trade (before the trade does anything at all). If you mean "win" by thinking "Yeah! I just made 650$! hell yeah!" and you don't feel the same when you make 5$, then your risk is too high. When you trade you should be calm before and during. The right level of risk in all reality is that point where you say "Wow! I just made 450!" and another day saying "G, I only made 440$!". This 1%,2%,3% per trade stuff is to keep people who think they know what they are doing to keep them out of harms way from themselves. Everyone has their own number, even 0.001%. Learn how money goes around and moves around and you will see there is no win or lose to be had.
2) First I would suggest that you concentrate on a certain aspect, let it be break outs, up/down trending, side trends etc. Then you master just that aspect. Mastering doesn't mean "yeah I know what it is". Mastering it means you can identify right at the beginning and right at the end. You can grab everything in between and you even dream about it. Then when the market changes and you are no longer an expert on the same pair you wait until you are again.There is another way also. Get a post-it note and write down "I will not lose money" and post it on the screen and before you enter a trade look at it.
3) Look at #2 and it should resolve this, but if it doesn't..You'll need to a few washable colored markers on hand. You also need a mirror. When you want to jump in, read the post it note. When you get out from a trade that made you jump in and it didn't look right to what you are doing, make a marker and mark a line on your forehead about 1/2 inch (1 CM). Then look in the mirror. If you do it again, use another color.
In the end, you'll look like a dumbass. The reason being on of these 3 reasons: a) You have not mastered your trading system when you think you have. b) You have a trading system that you put together that works but decide to go against it. c) You believe your system works to the fullest but in reality doesn't work. Your goal is not to look like a dumbass. Don't forget to wash your forehead before you go to sleep, the next day is a new day.
4) ??? You are limiting yourself. If you find a trade signal and it works 1 time. You got very lucky. If it works for a second time, well everything has it's lucky day in the sun. If it works for a 3rd time, take out a paper and a green and red marker. If the system would have made money from the beginning to the end (not if you do, but the system you are following) mark a green line on the paper. The second time, again, do it again and it will either be a red or green line next to it. Now you will see if your system works and you will see that each line is an entry. So it does come around. Then you limit yourself waiting. If you really have to then wait for 2 weeks until that signal comes around again. Or look for another pair while you wait those 2 weeks. Why only buck fiber? Why not buck kiwi or buck cable or fiber cable? If you really want to trade at that exact time then go through all the pairs looking for that signal and find one. If you're system is really good then then who cares about forex? You can use it on anything (stocks, bonds, futures, etc.) but, each category has it's own differences and dangers.
Gain money, and gain money consistently. That is your goal.