What trading system generates the best win/loss ratio?

I have been trading forex on and off for about 3 years now. Do to my busy work schedule, I have not had time to focus on forex as much as I had wanted to. However, during this time I have built up a wealth of information about forex from personal experience and reading posts on forex.

My question is this: what system have you found to generate the best win/loss ratio?

In my point of view, it would seem better to have 1 excellent trading strategy that is focused on 1 pair (my preference being GBP/USD). I do not see the point in trading multiple currencies as you could simply master 1 strategy for 1 currency pair and then just increase your risk for that pair instead of spreading out between several pairs/trades.

Does this make sense?

With 2:1 RR you need only 40% winners with 1:1 it's 51% and you on.
Everyting depends on the risk.

if you are just beginning, I agree, limit it to one pair. As you get better, expand to other pairs. Mainly for backup. Occasionally, the pair you like best will get into a range or get very choppy and difficult to trade and then you can look at other pairs to trade until your regular one settles down.

The system I trade is something my mentor and I have developed and it is not available. However, since you said your schedule is very busy, I would look into some of the better daily strategies. OZFx daily is a really good system. You can basically work it in about 20 minutes a day.

There's also the "breakeven" factor to consider. Neither a win nor a loss, done correctly it can mean the difference between a negative and a positive expectancy over longer time frames (years). Don't believe me? Look at S/R breakouts or MA crossover systems.

Even with a 70% win ratio you could still deplete your account, so proper money management is key and taking only prime setups.

There is no such thing as a silver bullet. Just pick one and get good at it. I believe that if you have a sound strategy and it works on one pair it will work on any pair if you can learn to adapt to its personality. But even inside a currency pair you will find it never quite acts that same way all the time. Adaptability is the key to trading successfully.
I have been trading forex on and off for about 3 years now. Do to my busy work schedule, I have not had time to focus on forex as much as I had wanted to. However, during this time I have built up a wealth of information about forex from personal experience and reading posts on forex.

Beginners luck you need to learn what the squiggly lines really are and how they work in relation to other indicators. I suggest going through babypips.com university. Good Luck!

IBFX.COM
Initially No dealing desk, No data feed fees. But I find that they offer some of the best service and tools for trading right that I have seen.