I think you can use 1pipfix for USDKRW pair and for all currency pair.

Which broker offers USDKRW pair?

I think stop loss is must loss in our trade . If you will never use any stop loss then you can recover your loss and trade without risk.

Trading Without a StopLoss

I am prefer M30 time frame for seek some profit but i also want trade with some longer time fram too.

What time frame do you trade and why?

In my opinion trading without Stop Loss is not good and we can loose our money immediately.

Trading Without a StopLoss

I think there are lot of article available on internet about binary options also you can take help from online forums like babypips or Forex factory.

A good source to learn about binary options?